A051231 as a triangular array
| | | | | | | | 1 |
| | | | | | | | -9 | | 1 |
| | | | | | | 162 | | -27 | | 1 |
| | | | | | -4374 | | 891 | | -54 | | 1 |
| | | | | 157464 | | -36450 | | 2835 | | -90 | | 1 |
| | | | -7085880 | | 1797714 | | -164025 | | 6885 | | -135 | | 1 |
| | | 382637520 | | -104162436 | | 10655064 | | -535815 | | 14175 | | -189 | | 1 |
| | -24106163760 | | 6944870988 | | -775431468 | | 44411409 | | -1428840 | | 26082 | | -252 | | 1 |
|
A051231 as a square array
| 1 | -9 | 162 | -4374 | 157464 | -7085880 | 382637520 | -24106163760
| | 1 | -27 | 891 | -36450 | 1797714 | -104162436 | 6944870988
| | 1 | -54 | 2835 | -164025 | 10655064 | -775431468
| | 1 | -90 | 6885 | -535815 | 44411409
| | 1 | -135 | 14175 | -1428840
| | 1 | -189 | 26082
| | 1 | -252
| | 1
|
A051231 as an upper right triangle
| 1 | -9 | 162 | -4374 | 157464 | -7085880 | 382637520 | -24106163760
| | 1 | -27 | 891 | -36450 | 1797714 | -104162436 | 6944870988
| | | 1 | -54 | 2835 | -164025 | 10655064 | -775431468
| | | | 1 | -90 | 6885 | -535815 | 44411409
| | | | | 1 | -135 | 14175 | -1428840
| | | | | | 1 | -189 | 26082
| | | | | | | 1 | -252
| | | | | | | | 1
|
|
