A215401 as a triangular array
| | | | | | | | | | | | | 1 |
| | | | | | | | | | | | | 1 | | 1 |
| | | | | | | | | | | | 1 | | 1 | | 0 |
| | | | | | | | | | | 1 | | 1 | | 1 | | 0 |
| | | | | | | | | | 1 | | 1 | | 1 | | 2 | | 0 |
| | | | | | | | | 1 | | 1 | | 1 | | 3 | | 0 | | 0 |
| | | | | | | | 1 | | 1 | | 1 | | 3 | | 5 | | 3 | | 0 |
| | | | | | | 1 | | 1 | | 1 | | 3 | | 6 | | 17 | | 0 | | 0 |
| | | | | | 1 | | 1 | | 1 | | 3 | | 6 | | 26 | | 35 | | 4 | | 0 |
| | | | | 1 | | 1 | | 1 | | 3 | | 6 | | 27 | | 84 | | 102 | | 0 | | 0 |
| | | | 1 | | 1 | | 1 | | 3 | | 6 | | 27 | | 98 | | 324 | | 240 | | 0 | | 0 |
| | | 1 | | 1 | | 1 | | 3 | | 6 | | 27 | | 99 | | 442 | | 1170 | | 665 | | 11 | | 0 |
| | 1 | | 1 | | 1 | | 3 | | 6 | | 27 | | 99 | | 462 | | 1968 | | 4412 | | 1661 |
|
A215401 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 | 1 | 1 | 1 | 1
| | 0 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1
| | 0 | 2 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3
| | 0 | 0 | 5 | 6 | 6 | 6 | 6 | 6 | 6
| | 0 | 3 | 17 | 26 | 27 | 27 | 27 | 27
| | 0 | 0 | 35 | 84 | 98 | 99 | 99
| | 0 | 4 | 102 | 324 | 442 | 462
| | 0 | 0 | 240 | 1170 | 1968
| | 0 | 0 | 665 | 4412
| | 0 | 11 | 1661
| | 0
|
A215401 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 | 1 | 1 | 1 | 1
| | | 0 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1
| | | | 0 | 2 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3
| | | | | 0 | 0 | 5 | 6 | 6 | 6 | 6 | 6 | 6
| | | | | | 0 | 3 | 17 | 26 | 27 | 27 | 27 | 27
| | | | | | | 0 | 0 | 35 | 84 | 98 | 99 | 99
| | | | | | | | 0 | 4 | 102 | 324 | 442 | 462
| | | | | | | | | 0 | 0 | 240 | 1170 | 1968
| | | | | | | | | | 0 | 0 | 665 | 4412
| | | | | | | | | | | 0 | 11 | 1661
| | | | | | | | | | | | 0
| | | | | | | | | | | |
|
|
