A008955 formatted as a triangular array:
| | | | | | | 1 | | | | | | | |
| | | | | | 1 | | 1 | | | | | | |
| | | | | 1 | | 5 | | 4 | | | | | |
| | | | 1 | | 14 | | 49 | | 36 | | | | |
| | | 1 | | 30 | | 273 | | 820 | | 576 | | | |
| | 1 | | 55 | | 1023 | | 7645 | | 21076 | | 14400 | | |
| 1 | | 91 | | 3003 | | 44473 | | 296296 | | 773136 | | 518400 | |
| 1 | | 140 | | 7462 | | 191620 | | 2475473 | | 15291640 | | 38402064 | | 25401600 |
A008955 formatted as a square array:
| 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 |
| 1 | 5 | 14 | 30 | 55 | 91 | 140 | |
| 4 | 49 | 273 | 1023 | 3003 | 7462 | | |
| 36 | 820 | 7645 | 44473 | 191620 | | | |
| 576 | 21076 | 296296 | 2475473 | | | | |
| 14400 | 773136 | 15291640 | | | | | |
| 518400 | 38402064 | | | | | | |
| 25401600 | | | | | | | |
A008955 formatted as an upper right triangle:
| 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 |
| 1 | 5 | 14 | 30 | 55 | 91 | 140 |
| | 4 | 49 | 273 | 1023 | 3003 | 7462 |
| | | 36 | 820 | 7645 | 44473 | 191620 |
| | | | 576 | 21076 | 296296 | 2475473 |
| | | | | 14400 | 773136 | 15291640 |
| | | | | | 518400 | 38402064 |
| | | | | | | 25401600 |
|
