A331509 as a triangular array
| | | | | | | | | | | 1 |
| | | | | | | | | | | 1 | | 1 |
| | | | | | | | | | 0 | | 1 | | 1 |
| | | | | | | | | 0 | | 1 | | 0 | | 1 |
| | | | | | | | 0 | | 1 | | 1 | | 0 | | 1 |
| | | | | | | 0 | | 1 | | 3 | | 0 | | 0 | | 1 |
| | | | | | 0 | | 1 | | 6 | | 3 | | 0 | | 0 | | 1 |
| | | | | 0 | | 1 | | 15 | | 19 | | 1 | | 0 | | 0 | | 1 |
| | | | 0 | | 1 | | 42 | | 141 | | 29 | | 0 | | 0 | | 0 | | 1 |
| | | 0 | | 1 | | 109 | | 1571 | | 769 | | 23 | | 0 | | 0 | | 0 | | 1 |
| | 0 | | 1 | | 320 |
|
A331509 as a square array
| 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0
| | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1
| | 1 | 0 | 1 | 3 | 6 | 15 | 42 | 109 | 320
| | 1 | 0 | 0 | 3 | 19 | 141 | 1571
| | 1 | 0 | 0 | 1 | 29 | 769
| | 1 | 0 | 0 | 0 | 23
| | 1 | 0 | 0 | 0
| | 1 | 0 | 0
| | 1 | 0
| | 1
|
A331509 as an upper right triangle
| 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0
| | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1
| | | 1 | 0 | 1 | 3 | 6 | 15 | 42 | 109 | 320
| | | | 1 | 0 | 0 | 3 | 19 | 141 | 1571
| | | | | 1 | 0 | 0 | 1 | 29 | 769
| | | | | | 1 | 0 | 0 | 0 | 23
| | | | | | | 1 | 0 | 0 | 0
| | | | | | | | 1 | 0 | 0
| | | | | | | | | 1 | 0
| | | | | | | | | | 1
| | | | | | | | | |
|
|
