A047874 formatted as a triangular array:
| | | | | | | | 1 | | | | | | | | |
| | | | | | | 1 | | 1 | | | | | | | |
| | | | | | 1 | | 4 | | 1 | | | | | | |
| | | | | 1 | | 13 | | 9 | | 1 | | | | | |
| | | | 1 | | 41 | | 61 | | 16 | | 1 | | | | |
| | | 1 | | 131 | | 381 | | 181 | | 25 | | 1 | | | |
| | 1 | | 428 | | 2332 | | 1821 | | 421 | | 36 | | 1 | | |
| 1 | | 1429 | | 14337 | | 17557 | | 6105 | | 841 | | 49 | | 1 | |
| 1 | | 4861 | | 89497 | | 167449 | | 83029 | | 16465 | | 1513 | | 64 | | 1 |
A047874 formatted as a square array:
| 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 |
| 1 | 4 | 13 | 41 | 131 | 428 | 1429 | 4861 | |
| 1 | 9 | 61 | 381 | 2332 | 14337 | 89497 | | |
| 1 | 16 | 181 | 1821 | 17557 | 167449 | | | |
| 1 | 25 | 421 | 6105 | 83029 | | | | |
| 1 | 36 | 841 | 16465 | | | | | |
| 1 | 49 | 1513 | | | | | | |
| 1 | 64 | | | | | | | |
| 1 | | | | | | | | |
A047874 formatted as an upper right triangle:
| 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 |
| 1 | 4 | 13 | 41 | 131 | 428 | 1429 | 4861 |
| | 1 | 9 | 61 | 381 | 2332 | 14337 | 89497 |
| | | 1 | 16 | 181 | 1821 | 17557 | 167449 |
| | | | 1 | 25 | 421 | 6105 | 83029 |
| | | | | 1 | 36 | 841 | 16465 |
| | | | | | 1 | 49 | 1513 |
| | | | | | | 1 | 64 |
| | | | | | | | 1 |
|
