A181187 as a triangular array
| | | | | | | | | | | | | 1 |
| | | | | | | | | | | | | 3 | | 1 |
| | | | | | | | | | | | 6 | | 2 | | 1 |
| | | | | | | | | | | 12 | | 5 | | 2 | | 1 |
| | | | | | | | | | 20 | | 8 | | 4 | | 2 | | 1 |
| | | | | | | | | 35 | | 16 | | 8 | | 4 | | 2 | | 1 |
| | | | | | | | 54 | | 24 | | 13 | | 7 | | 4 | | 2 | | 1 |
| | | | | | | 86 | | 41 | | 22 | | 13 | | 7 | | 4 | | 2 | | 1 |
| | | | | | 128 | | 61 | | 35 | | 20 | | 12 | | 7 | | 4 | | 2 | | 1 |
| | | | | 192 | | 95 | | 54 | | 33 | | 20 | | 12 | | 7 | | 4 | | 2 | | 1 |
| | | | 275 | | 136 | | 80 | | 49 | | 31 | | 19 | | 12 | | 7 | | 4 | | 2 | | 1 |
| | | 399 | | 204 | | 121 | | 76 | | 48 | | 31 | | 19 | | 12 | | 7 | | 4 | | 2 | | 1 |
| | 556 | | 284 |
|
A181187 as a square array
1 | 3 | 6 | 12 | 20 | 35 | 54 | 86 | 128 | 192 | 275 | 399 | 556
| 1 | 2 | 5 | 8 | 16 | 24 | 41 | 61 | 95 | 136 | 204 | 284
| 1 | 2 | 4 | 8 | 13 | 22 | 35 | 54 | 80 | 121
| 1 | 2 | 4 | 7 | 13 | 20 | 33 | 49 | 76
| 1 | 2 | 4 | 7 | 12 | 20 | 31 | 48
| 1 | 2 | 4 | 7 | 12 | 19 | 31
| 1 | 2 | 4 | 7 | 12 | 19
| 1 | 2 | 4 | 7 | 12
| 1 | 2 | 4 | 7
| 1 | 2 | 4
| 1 | 2
| 1
|
A181187 as an upper right triangle
1 | 3 | 6 | 12 | 20 | 35 | 54 | 86 | 128 | 192 | 275 | 399 | 556
| | 1 | 2 | 5 | 8 | 16 | 24 | 41 | 61 | 95 | 136 | 204 | 284
| | | 1 | 2 | 4 | 8 | 13 | 22 | 35 | 54 | 80 | 121
| | | | 1 | 2 | 4 | 7 | 13 | 20 | 33 | 49 | 76
| | | | | 1 | 2 | 4 | 7 | 12 | 20 | 31 | 48
| | | | | | 1 | 2 | 4 | 7 | 12 | 19 | 31
| | | | | | | 1 | 2 | 4 | 7 | 12 | 19
| | | | | | | | 1 | 2 | 4 | 7 | 12
| | | | | | | | | 1 | 2 | 4 | 7
| | | | | | | | | | 1 | 2 | 4
| | | | | | | | | | | 1 | 2
| | | | | | | | | | | | 1
| | | | | | | | | | | |
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|