' Generates Associated Lozenge Squares of order 7
' Diamond Inlays order 3 and 4

' Tested with Office 2007 under Windows 7

```Sub MgcSqr7c()

Dim a(49), b(49), c(49)

y = MsgBox("Locked", vbCritical, "Routine MgcSqr7c")
End

n2 = 0: n9 = 0: k1 = 1: k2 = 1
m1 = 1: m2 = 49: s1 = 175

'   Generate data

t1 = Timer

a(25) = s1 / 7: b(a(25)) = a(25): c(25) = a(25)

For j28 = m1 To m2 Step 2                                              'a(28) odd    Diamond 4
If b(j28) = 0 Then b(j28) = j28: c(28) = j28 Else GoTo 280
a(28) = j28

a(22) = 50 - a(28)
If b(a(22)) = 0 Then b(a(22)) = a(22): c(22) = a(22) Else GoTo 220

For j34 = m1 To m2 Step 2                                              'a(34) odd    Diamond 4
If b(j34) = 0 Then b(j34) = j34: c(34) = j34 Else GoTo 340
a(34) = j34

a(16) = 50 - a(34)
If b(a(16)) = 0 Then b(a(16)) = a(16): c(16) = a(16) Else GoTo 160

For j40 = m1 To m2 Step 2                                              'a(40) odd    Diamond 4
If b(j40) = 0 Then b(j40) = j40: c(40) = j40 Else GoTo 400
a(40) = j40

a(46) = 100 - a(40) - a(34) - a(28)
If a(46) <= 0 Or a(46) > 49 Then GoTo 460
If CInt(a(46) / 2) = a(46) / 2 Then GoTo 460                      'a(46) odd
If b(a(46)) = 0 Then b(a(46)) = a(46): c(46) = a(46) Else GoTo 460

a(4) = 50 - a(46)
If b(a(4)) = 0 Then b(a(4)) = a(4): c(4) = a(4) Else GoTo 40
a(10) = 50 - a(40)
If b(a(10)) = 0 Then b(a(10)) = a(10): c(10) = a(10) Else GoTo 100

For j20 = m1 To m2 Step 2                                               'a(20) odd    Diamond 4
If b(j20) = 0 Then b(j20) = j20: c(20) = j20 Else GoTo 200
a(20) = j20

a(38) = a(20) - a(46) + a(28)
If a(38) <= 0 Or a(38) > 49 Then GoTo 380
If CInt(a(38) / 2) = a(38) / 2 Then GoTo 380                       'a(46) odd
If b(a(38)) = 0 Then b(a(38)) = a(38): c(38) = a(38) Else GoTo 380

a(12) = 50 - a(38)
If b(a(12)) = 0 Then b(a(12)) = a(12): c(12) = a(12) Else GoTo 120

a(26) = 100 - a(20) - a(34) - a(28)
If a(26) <= 0 Or a(26) > 49 Then GoTo 260
If CInt(a(26) / 2) = a(26) / 2 Then GoTo 260                      'a(26) odd
If b(a(26)) = 0 Then b(a(26)) = a(26): c(26) = a(26) Else GoTo 260

a(24) = 50 - a(26)
If b(a(24)) = 0 Then b(a(24)) = a(24): c(24) = a(24) Else GoTo 240

a(32) = 100 - a(26) - 2 * a(20) + a(46) - a(28)
If a(32) <= 0 Or a(32) > 49 Then GoTo 320
If CInt(a(32) / 2) = a(32) / 2 Then GoTo 320                      'a(32) odd
If b(a(32)) = 0 Then b(a(32)) = a(32): c(32) = a(32) Else GoTo 320

a(18) = 50 - a(32)
If b(a(18)) = 0 Then b(a(18)) = a(18): c(18) = a(18) Else GoTo 180
a(30) = 50 - a(20)
If b(a(30)) = 0 Then b(a(30)) = a(30): c(30) = a(30) Else GoTo 300

For j27 = m1 To m2 Step 2                                              'a(27) odd    Diamond 3
If b(j27) = 0 Then b(j27) = j27: c(27) = j27 Else GoTo 270
a(27) = j27

a(23) = 50 - a(27)
If b(a(23)) = 0 Then b(a(23)) = a(23): c(23) = a(23) Else GoTo 230

For j33 = m1 To m2 Step 2                                              'a(33) odd    Diamond 3
If b(j33) = 0 Then b(j33) = j33: c(33) = j33 Else GoTo 330
a(33) = j33

a(39) = 75 - a(33) - a(27)
If a(39) <= 0 Or a(39) > 49 Then GoTo 390
If CInt(a(39) / 2) = a(39) / 2 Then GoTo 390                      'a(39) odd
If b(a(39)) = 0 Then b(a(39)) = a(39): c(39) = a(39) Else GoTo 390

a(11) = 50 - a(39)
If b(a(11)) = 0 Then b(a(11)) = a(11): c(11) = a(11) Else GoTo 110

a(19) = 100 - a(33) - 2 * a(27)
If a(19) <= 0 Or a(19) > 49 Then GoTo 190
If CInt(a(19) / 2) = a(19) / 2 Then GoTo 190                      'a(19) odd
If b(a(19)) = 0 Then b(a(19)) = a(19): c(19) = a(19) Else GoTo 190

a(31) = 50 - a(19)
If b(a(31)) = 0 Then b(a(31)) = a(31): c(31) = a(31) Else GoTo 310
a(17) = 50 - a(33)
If b(a(17)) = 0 Then b(a(17)) = a(17): c(17) = a(17) Else GoTo 170

For j49 = m1 + 1 To m2 - 1 Step 2                                            'a(49) even
If b(j49) = 0 Then b(j49) = j49: c(49) = j49 Else GoTo 490
a(49) = j49

a(1) = 50 - a(49)
If b(a(1)) = 0 Then b(a(1)) = a(1): c(1) = a(1) Else GoTo 10

For j48 = m1 + 1 To m2 - 1 Step 2                                            'a(48) even
If b(j48) = 0 Then b(j48) = j48: c(48) = j48 Else GoTo 480
a(48) = j48

a(2) = 50 - a(48)
If b(a(2)) = 0 Then b(a(2)) = a(2): c(2) = a(2) Else GoTo 20

For j47 = m1 + 1 To m2 - 1 Step 2                                            'a(47) even
If b(j47) = 0 Then b(j47) = j47: c(47) = j47 Else GoTo 470
a(47) = j47

a(45) = 25 + a(47) - 2 * a(27) + a(26) - a(20) + a(46) + a(40) - a(28)
If a(45) <= 0 Or a(45) > 49 Then GoTo 450
If CInt(a(45) / 2) <> a(45) / 2 Then GoTo 450                           'a(45) even
If b(a(45)) = 0 Then b(a(45)) = a(45): c(45) = a(45) Else GoTo 450

a(5) = 50 - a(45)
If b(a(5)) = 0 Then b(a(5)) = a(5): c(5) = a(5) Else GoTo 50
a(3) = 50 - a(47)
If b(a(3)) = 0 Then b(a(3)) = a(3): c(3) = a(3) Else GoTo 30

For j44 = m1 + 1 To m2 - 1 Step 2                                             'a(44) even
If b(j44) = 0 Then b(j44) = j44: c(44) = j44 Else GoTo 440
a(44) = j44

a(43) = 175 - a(44) - a(45) - a(47) - a(48) - a(49) - a(46)
If a(43) <= 0 Or a(43) > 49 Then GoTo 430
If CInt(a(43) / 2) <> a(43) / 2 Then GoTo 430                            'a(43) even
If b(a(43)) = 0 Then b(a(43)) = a(43): c(43) = a(43) Else GoTo 430

a(7) = 50 - a(43)
If b(a(7)) = 0 Then b(a(7)) = a(7): c(7) = a(7) Else GoTo 70
a(6) = 50 - a(44)
If b(a(6)) = 0 Then b(a(6)) = a(6): c(6) = a(6) Else GoTo 60

For j42 = m1 + 1 To m2 - 1 Step 2                                             'a(42) even
If b(j42) = 0 Then b(j42) = j42: c(42) = j42 Else GoTo 420
a(42) = j42

a(8) = 50 - a(42)
If b(a(8)) = 0 Then b(a(8)) = a(8): c(8) = a(8) Else GoTo 80

For j41 = m1 + 1 To m2 - 1 Step 2                                             'a(41) even
If b(j41) = 0 Then b(j41) = j41: c(41) = j41 Else GoTo 410
a(41) = j41

a(9) = 50 - a(41)
If b(a(9)) = 0 Then b(a(9)) = a(9): c(9) = a(9) Else GoTo 90

a(35) = (425 - 2*a(41) - 2*a(42) - 2*a(47) - 2*a(48) - 2*a(49) - a(33) + 2*a(20) - 2*a(46) - 2*a(40) - 2*a(34)) / 2
If a(35) <= 0 Or a(35) > 49 Or Int(a(35)) <> a(35) Then GoTo 350
If CInt(a(35) / 2) <> a(35) / 2 Then GoTo 350                            'a(35) even
If b(a(35)) = 0 Then b(a(35)) = a(35): c(35) = a(35) Else GoTo 350

a(15) = 50 - a(35)
If b(a(15)) = 0 Then b(a(15)) = a(15): c(15) = a(15) Else GoTo 150

a(36) = 175 - 2 * a(41) - a(42) + a(44) - a(48) + a(33) - 2 * a(20) + a(46) - a(40) - a(34) - a(28)
If a(36) <= 0 Or a(36) > 49 Then GoTo 360
If CInt(a(36) / 2) <> a(36) / 2 Then GoTo 360                            'a(36) even
If b(a(36)) = 0 Then b(a(36)) = a(36): c(36) = a(36) Else GoTo 360

a(14) = 50 - a(36)
If b(a(14)) = 0 Then b(a(14)) = a(14): c(14) = a(14) Else GoTo 140

a(37) = -75 + a(41) - a(44) + a(48) + a(27) + a(20) + a(34)
If a(37) <= 0 Or a(37) > 49 Then GoTo 370                                'a(37) even
If CInt(a(37) / 2) <> a(37) / 2 Then GoTo 370
If b(a(37)) = 0 Then b(a(37)) = a(37): c(37) = a(37) Else GoTo 370

a(13) = 50 - a(37)
If b(a(13)) = 0 Then b(a(13)) = a(13): c(13) = a(13) Else GoTo 130

a(29) = 75 - a(35) - 2 * a(33) - 2 * a(27) + a(26) + 3 * a(20) - a(46) - a(34) + a(28)
If a(29) <= 0 Or a(29) > 49 Then GoTo 290
If CInt(a(29) / 2) <> a(29) / 2 Then GoTo 290                            'a(29) even
If b(a(29)) = 0 Then b(a(29)) = a(29): c(29) = a(29) Else GoTo 290

a(21) = 50 - a(29)
If b(a(21)) = 0 Then b(a(21)) = a(21): c(21) = a(21) Else GoTo 210

n9 = n9 + 1
GoSub 2650 'Print results (squares)
'                                   GoSub 2645 'Print results (selected numbers

b(c(21)) = 0: c(21) = 0
210 b(c(29)) = 0: c(29) = 0
290 b(c(13)) = 0: c(13) = 0
130 b(c(37)) = 0: c(37) = 0
370 b(c(14)) = 0: c(14) = 0
140 b(c(36)) = 0: c(36) = 0
360 b(c(15)) = 0: c(15) = 0
150 b(c(35)) = 0: c(35) = 0
350 b(c(9)) = 0: c(9) = 0
90  b(c(41)) = 0: c(41) = 0
410 Next j41

b(c(8)) = 0: c(8) = 0
80  b(c(42)) = 0: c(42) = 0
420 Next j42

b(c(6)) = 0: c(6) = 0
60  b(c(7)) = 0: c(7) = 0
70  b(c(43)) = 0: c(43) = 0
430 b(c(44)) = 0: c(44) = 0
440 Next j44

b(c(3)) = 0: c(3) = 0
30  b(c(5)) = 0: c(5) = 0
50  b(c(45)) = 0: c(45) = 0
450 b(c(47)) = 0: c(47) = 0
470 Next j47

b(c(2)) = 0: c(2) = 0
20  b(c(48)) = 0: c(48) = 0
480 Next j48

b(c(1)) = 0: c(1) = 0
10  b(c(49)) = 0: c(49) = 0
490 Next j49

b(c(17)) = 0: c(17) = 0
170 b(c(31)) = 0: c(31) = 0
310 b(c(19)) = 0: c(19) = 0
190 b(c(11)) = 0: c(11) = 0
110 b(c(39)) = 0: c(39) = 0
390 b(c(33)) = 0: c(33) = 0
330 Next j33

b(c(23)) = 0: c(23) = 0
230 b(c(27)) = 0: c(27) = 0
270 Next j27

b(c(30)) = 0: c(30) = 0
300 b(c(18)) = 0: c(18) = 0
180 b(c(32)) = 0: c(32) = 0
320 b(c(24)) = 0: c(24) = 0
240 b(c(26)) = 0: c(26) = 0
260 b(c(12)) = 0: c(12) = 0
120 b(c(38)) = 0: c(38) = 0
380 b(c(20)) = 0: c(20) = 0
200 Next j20

b(c(10)) = 0: c(10) = 0
100 b(c(4)) = 0: c(4) = 0
40  b(c(46)) = 0: c(46) = 0
460 b(c(40)) = 0: c(40) = 0
400 Next j40

b(c(16)) = 0: c(16) = 0
160 b(c(34)) = 0: c(34) = 0
340 Next j34

b(c(22)) = 0: c(22) = 0
220 b(c(28)) = 0: c(28) = 0
280 Next j28

t2 = Timer

t10 = Str(t2 - t1) + " sec., " + Str(n9) + " Solutions for sum" + Str(s1)
y = MsgBox(t10, 0, "Routine MgcSqr7c")

End

'   Print results (selected numbers)

2645 For i1 = 1 To 49
Cells(n9, i1).Value = a(i1)
Next i1
Cells(n9, 50).Select
Return

'   Print results (squares)

2650 n2 = n2 + 1
If n2 = 5 Then
n2 = 1: k1 = k1 + 8: k2 = 1
Else
If n9 > 1 Then k2 = k2 + 8
End If

Cells(k1, k2 + 1).Select
Cells(k1, k2 + 1).Font.Color = -4165632
Cells(k1, k2 + 1).Value = n9

i3 = 0
For i1 = 1 To 7
For i2 = 1 To 7
i3 = i3 + 1
Cells(k1 + i1, k2 + i2).Value = a(i3)
Next i2
Next i1

Return

End Sub
```