A219987 as a triangular array
| | | | | | | | | | | 1 |
| | | | | | | | | | | 1 | | 1 |
| | | | | | | | | | 1 | | 0 | | 1 |
| | | | | | | | | 1 | | 1 | | 1 | | 1 |
| | | | | | | | 1 | | 0 | | 2 | | 0 | | 1 |
| | | | | | | 1 | | 1 | | 5 | | 5 | | 1 | | 1 |
| | | | | | 1 | | 0 | | 11 | | 8 | | 11 | | 0 | | 1 |
| | | | | 1 | | 1 | | 24 | | 55 | | 55 | | 24 | | 1 | | 1 |
| | | | 1 | | 0 | | 53 | | 140 | | 380 | | 140 | | 53 | | 0 | | 1 |
| | | 1 | | 1 | | 117 | | 633 | | 2319 | | 2319 | | 633 | | 117 | | 1 | | 1 |
| | 1 | | 0 | | 258 | | 1984 | | 15171 | | 21272 | | 15171 | | 1984 | | 258 | | 0 | | 1 |
|
A219987 as a square array
| 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1
| | 1 | 0 | 1 | 0 | 1 | 0 | 1 | 0 | 1 | 0
| | 1 | 1 | 2 | 5 | 11 | 24 | 53 | 117 | 258
| | 1 | 0 | 5 | 8 | 55 | 140 | 633 | 1984
| | 1 | 1 | 11 | 55 | 380 | 2319 | 15171
| | 1 | 0 | 24 | 140 | 2319 | 21272
| | 1 | 1 | 53 | 633 | 15171
| | 1 | 0 | 117 | 1984
| | 1 | 1 | 258
| | 1 | 0
| | 1
|
A219987 as an upper right triangle
| 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1
| | 1 | 0 | 1 | 0 | 1 | 0 | 1 | 0 | 1 | 0
| | | 1 | 1 | 2 | 5 | 11 | 24 | 53 | 117 | 258
| | | | 1 | 0 | 5 | 8 | 55 | 140 | 633 | 1984
| | | | | 1 | 1 | 11 | 55 | 380 | 2319 | 15171
| | | | | | 1 | 0 | 24 | 140 | 2319 | 21272
| | | | | | | 1 | 1 | 53 | 633 | 15171
| | | | | | | | 1 | 0 | 117 | 1984
| | | | | | | | | 1 | 1 | 258
| | | | | | | | | | 1 | 0
| | | | | | | | | | | 1
|
|
