' Generates Associated Lozenge Squares of order 5

' Tested with Office 2007 under Windows 7

```Sub MgcSqr5c2()

Dim a(25), b(25), c(25)

y = MsgBox("Locked", vbCritical, "Routine MgcSqr5c2")
End

n2 = 0: n3 = 0: n9 = 0: k1 = 1: k2 = 1
m1 = 1: m2 = 25: s1 = 65

'   Generate data

t1 = Timer

a(13) = 0.2 * s1: b(a(13)) = a(13)

For j25 = m1 + 1 To m2 - 1 Step 2                                      'a(25) even
If b(j25) = 0 Then b(j25) = j25: c(25) = j25 Else GoTo 250
a(25) = j25

a(1) = 0.4 * s1 - a(25)
If a(1) < m1 Or a(1) > m2 Then GoTo 10
If b(a(1)) = 0 Then b(a(1)) = a(1): c(1) = a(1) Else GoTo 10

For j24 = m1 + 1 To m2 - 1 Step 2                                      'a(24) even
If b(j24) = 0 Then b(j24) = j24: c(24) = j24 Else GoTo 240
a(24) = j24

a(2) = 0.4 * s1 - a(24)
If a(2) < m1 Or a(2) > m2 Then GoTo 20
If b(a(2)) = 0 Then b(a(2)) = a(2): c(2) = a(2) Else GoTo 20

For j23 = m1 To m2 Step 2                                              'a(23) odd
If b(j23) = 0 Then b(j23) = j23: c(23) = j23 Else GoTo 230
a(23) = j23

a(3) = 0.4 * s1 - a(23)
If a(3) < m1 Or a(3) > m2 Then GoTo 30
If b(a(3)) = 0 Then b(a(3)) = a(3): c(3) = a(3) Else GoTo 30

For j22 = m1 + 1 To m2 - 1 Step 2                                      'a(22) even
If b(j22) = 0 Then b(j22) = j22: c(22) = j22 Else GoTo 220
a(22) = j22

a(21) = s1 - a(22) - a(23) - a(24) - a(25)
If a(21) < m1 Or a(21) > m2 Then GoTo 210
If CInt(a(21) / 2) <> a(21) / 2 Then GoTo 210                          'a(21) even
If b(a(21)) = 0 Then b(a(21)) = a(21): c(21) = a(21) Else GoTo 210

a(5) = 0.4 * s1 - a(21)
If a(5) < m1 Or a(5) > m2 Then GoTo 50
If b(a(5)) = 0 Then b(a(5)) = a(5): c(5) = a(5) Else GoTo 50

a(4) = 0.4 * s1 - a(22)
If a(4) < m1 Or a(4) > m2 Then GoTo 40
If b(a(4)) = 0 Then b(a(4)) = a(4): c(4) = a(4) Else GoTo 40

For j20 = m1 + 1 To m2 - 1 Step 2                                      'a(20) even
If b(j20) = 0 Then b(j20) = j20: c(20) = j20 Else GoTo 200
a(20) = j20

a(6) = 2 * s1 / 5 - a(20)
If a(6) < m1 Or a(6) > m2 Then GoTo 60
If b(a(6)) = 0 Then b(a(6)) = a(6): c(6) = a(6) Else GoTo 60

For j19 = m1 To m2 Step 2                                              'a(19) odd
If b(j19) = 0 Then b(j19) = j19: c(19) = j19 Else GoTo 190
a(19) = j19

a(7) = 0.4 * s1 - a(19)
If a(7) < m1 Or a(7) > m2 Then GoTo 70
If b(a(7)) = 0 Then b(a(7)) = a(7): c(7) = a(7) Else GoTo 70

For j18 = m1 To m2 Step 2                                              'a(18) odd
If b(j18) = 0 Then b(j18) = j18: c(18) = j18 Else GoTo 180
a(18) = j18

a(8) = 0.4 * s1 - a(18)
If a(8) < m1 Or a(8) > m2 Then GoTo 80
If b(a(8)) = 0 Then b(a(8)) = a(8): c(8) = a(8) Else GoTo 80

For j17 = m1 To m2 Step 2                                              'a(17) odd
If b(j17) = 0 Then b(j17) = j17: c(17) = j17 Else GoTo 170
a(17) = j17

a(16) = s1 - a(17) - a(18) - a(19) - a(20)
If a(16) < m1 Or a(16) > m2 Then GoTo 160
If CInt(a(16) / 2) <> a(16) / 2 Then GoTo 160                          'a(16) even
If b(a(16)) = 0 Then b(a(16)) = a(16): c(16) = a(16) Else GoTo 160

a(15) = s1 / 5 + a(16) - a(20) + a(21) - a(25)
If a(15) < m1 Or a(15) > m2 Then GoTo 150
If CInt(a(15) / 2) = a(15) / 2 Then GoTo 150                           'a(15) odd
If b(a(15)) = 0 Then b(a(15)) = a(15): c(15) = a(15) Else GoTo 150

a(14) = s1 / 5 + a(17) - a(19) + a(22) - a(24)
If a(14) < m1 Or a(14) > m2 Then GoTo 140
If CInt(a(14) / 2) = a(14) / 2 Then GoTo 140                           'a(14) odd
If b(a(14)) = 0 Then b(a(14)) = a(14): c(14) = a(14) Else GoTo 140

a(12) = 2 * s1 / 5 - a(14)
If a(12) < m1 Or a(12) > m2 Then GoTo 120
If b(a(12)) = 0 Then b(a(12)) = a(12): c(12) = a(12) Else GoTo 120

a(11) = 2 * s1 / 5 - a(15)
If a(11) < m1 Or a(11) > m2 Then GoTo 110
If b(a(11)) = 0 Then b(a(11)) = a(11): c(11) = a(11) Else GoTo 110

a(10) = 2 * s1 / 5 - a(16)
If a(10) < m1 Or a(10) > m2 Then GoTo 100
If b(a(10)) = 0 Then b(a(10)) = a(10): c(10) = a(10) Else GoTo 100

a(9) = 2 * s1 / 5 - a(17)
If a(9) < m1 Or a(9) > m2 Then GoTo 90
If b(a(9)) = 0 Then b(a(9)) = a(9): c(9) = a(9) Else GoTo 90

n9 = n9 + 1
GoSub 650 'Print results (squares)
'                          GoSub 640 'Print results (selected numbers)

b(c(9)) = 0: c(9) = 0
90  b(c(10)) = 0: c(10) = 0
100 b(c(11)) = 0: c(11) = 0
110 b(c(12)) = 0: c(12) = 0
120 b(c(14)) = 0: c(14) = 0
140 b(c(15)) = 0: c(15) = 0
150 b(c(16)) = 0: c(16) = 0
160 b(c(17)) = 0: c(17) = 0
170 Next j17

b(c(8)) = 0: c(8) = 0
80  b(c(18)) = 0: c(18) = 0
180 Next j18

b(c(7)) = 0: c(7) = 0
70  b(c(19)) = 0: c(19) = 0
190 Next j19

b(c(6)) = 0: c(6) = 0
60  b(c(20)) = 0: c(20) = 0
200 Next j20

b(c(4)) = 0: c(4) = 0
40  b(c(5)) = 0: c(5) = 0
50  b(c(21)) = 0: c(21) = 0
210 b(c(22)) = 0: c(22) = 0
220 Next j22

b(c(3)) = 0: c(3) = 0
30  b(c(23)) = 0: c(23) = 0
230 Next j23

b(c(2)) = 0: c(2) = 0
20  b(c(24)) = 0: c(24) = 0
240 Next j24

b(c(1)) = 0: c(1) = 0
10  b(c(25)) = 0: c(25) = 0
250 Next j25

t2 = Timer

t10 = Str(t2 - t1) + " sec., " + Str(n9) + " Solutions for sum" + Str(s1)
y = MsgBox(t10, 0, "Routine MgcSqr5c2")

End

'   Print results (selected numbers)

640 For i1 = 1 To 25
Cells(n9, i1).Value = a(i1)
Next i1

Return

'   Print results (squares)

650 n2 = n2 + 1
If n2 = 5 Then
n2 = 1: k1 = k1 + 6: k2 = 1
Else
If n9 > 1 Then k2 = k2 + 6
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 5
For i2 = 1 To 5
i3 = i3 + 1
Cells(k1 + i1, k2 + i2).Value = a(i3)
Next i2
Next i1

Return

End Sub
```