A108872 as a triangular array
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A108872 as a square array
2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13
| 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14
| 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15
| 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16
| 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17
| 12 | 13 | 14 | 15 | 16 | 17 | 18
| 14 | 15 | 16 | 17 | 18 | 19
| 16 | 17 | 18 | 19 | 20
| 18 | 19 | 20 | 21
| 20 | 21 | 22
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A108872 as an upper right triangle
2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13
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| | | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15
| | | | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16
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| | | | | | 12 | 13 | 14 | 15 | 16 | 17 | 18
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