Every number a from 1 to 25 is represented by a certain basic pattern:
| a | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 |
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The pattern belonging to a single 5x5 magic square will be repeated twelve times in a 3x4-scheme.