A264909 as a triangular array
| | | | | | | | | | | 1 |
| | | | | | | | | | | 1 | | 1 |
| | | | | | | | | | 1 | | 1 | | 0 |
| | | | | | | | | 1 | | 1 | | 1 | | 0 |
| | | | | | | | 1 | | 1 | | 2 | | 2 | | 0 |
| | | | | | | 1 | | 1 | | 3 | | 6 | | 5 | | 0 |
| | | | | | 1 | | 1 | | 4 | | 12 | | 21 | | 16 | | 0 |
| | | | | 1 | | 1 | | 5 | | 20 | | 54 | | 87 | | 61 | | 0 |
| | | | 1 | | 1 | | 6 | | 30 | | 110 | | 276 | | 413 | | 271 | | 0 |
| | | 1 | | 1 | | 7 | | 42 | | 195 | | 670 | | 1574 | | 2213 | | 1372 | | 0 |
| | 1 | | 1 | | 8 | | 56 | | 315 | | 1380 | | 4470 | | 9916 | | 13205 | | 7795 | | 0 |
|
A264909 as a square array
| 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1
| | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1
| | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8
| | 0 | 2 | 6 | 12 | 20 | 30 | 42 | 56
| | 0 | 5 | 21 | 54 | 110 | 195 | 315
| | 0 | 16 | 87 | 276 | 670 | 1380
| | 0 | 61 | 413 | 1574 | 4470
| | 0 | 271 | 2213 | 9916
| | 0 | 1372 | 13205
| | 0 | 7795
| | 0
|
A264909 as an upper right triangle
| 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1
| | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1
| | | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8
| | | | 0 | 2 | 6 | 12 | 20 | 30 | 42 | 56
| | | | | 0 | 5 | 21 | 54 | 110 | 195 | 315
| | | | | | 0 | 16 | 87 | 276 | 670 | 1380
| | | | | | | 0 | 61 | 413 | 1574 | 4470
| | | | | | | | 0 | 271 | 2213 | 9916
| | | | | | | | | 0 | 1372 | 13205
| | | | | | | | | | 0 | 7795
| | | | | | | | | | | 0
|
|
