A121522 as a triangular array
| | | | | | | | | | | | 1 |
| | | | | | | | | | | | 1 | | 1 |
| | | | | | | | | | | 1 | | 3 | | 1 |
| | | | | | | | | | 1 | | 5 | | 6 | | 1 |
| | | | | | | | | 1 | | 8 | | 15 | | 9 | | 1 |
| | | | | | | | 1 | | 11 | | 30 | | 34 | | 12 | | 1 |
| | | | | | | 1 | | 14 | | 55 | | 85 | | 62 | | 15 | | 1 |
| | | | | | 1 | | 17 | | 89 | | 185 | | 200 | | 99 | | 18 | | 1 |
| | | | | 1 | | 20 | | 132 | | 365 | | 510 | | 402 | | 145 | | 21 | | 1 |
| | | | 1 | | 23 | | 184 | | 650 | | 1160 | | 1220 | | 718 | | 200 | | 24 | | 1 |
| | | 1 | | 26 | | 245 | | 1067 | | 2400 | | 3155 | | 2585 | | 1175 | | 264 | | 27 | | 1 |
| | 1 | | 29 | | 315 |
|
A121522 as a square array
| 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1
| | 1 | 3 | 5 | 8 | 11 | 14 | 17 | 20 | 23 | 26 | 29
| | 1 | 6 | 15 | 30 | 55 | 89 | 132 | 184 | 245 | 315
| | 1 | 9 | 34 | 85 | 185 | 365 | 650 | 1067
| | 1 | 12 | 62 | 200 | 510 | 1160 | 2400
| | 1 | 15 | 99 | 402 | 1220 | 3155
| | 1 | 18 | 145 | 718 | 2585
| | 1 | 21 | 200 | 1175
| | 1 | 24 | 264
| | 1 | 27
| | 1
|
A121522 as an upper right triangle
| 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1
| | 1 | 3 | 5 | 8 | 11 | 14 | 17 | 20 | 23 | 26 | 29
| | | 1 | 6 | 15 | 30 | 55 | 89 | 132 | 184 | 245 | 315
| | | | 1 | 9 | 34 | 85 | 185 | 365 | 650 | 1067
| | | | | 1 | 12 | 62 | 200 | 510 | 1160 | 2400
| | | | | | 1 | 15 | 99 | 402 | 1220 | 3155
| | | | | | | 1 | 18 | 145 | 718 | 2585
| | | | | | | | 1 | 21 | 200 | 1175
| | | | | | | | | 1 | 24 | 264
| | | | | | | | | | 1 | 27
| | | | | | | | | | | 1
| | | | | | | | | | |
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