A278987 as a triangular array
| | | | | | | | | | | | 0 |
| | | | | | | | | | | | 1 | | 0 |
| | | | | | | | | | | 1 | | 1 | | 0 |
| | | | | | | | | | 1 | | 1 | | 1 | | 0 |
| | | | | | | | | 1 | | 4 | | 1 | | 1 | | 0 |
| | | | | | | | 1 | | 11 | | 4 | | 1 | | 1 | | 0 |
| | | | | | | 1 | | 26 | | 11 | | 4 | | 1 | | 1 | | 0 |
| | | | | | 1 | | 57 | | 41 | | 11 | | 4 | | 1 | | 1 | | 0 |
| | | | | 1 | | 120 | | 162 | | 41 | | 11 | | 4 | | 1 | | 1 | | 0 |
| | | | 1 | | 247 | | 610 | | 162 | | 41 | | 11 | | 4 | | 1 | | 1 | | 0 |
| | | 1 | | 502 | | 2165 | | 715 | | 162 | | 41 | | 11 | | 4 | | 1 | | 1 | | 0 |
| | 1 | | 1013 | | 7327 | | 3425 | | 715 | | 162 | | 41 | | 11 | | 4 | | 1 | | 1 | | 0 |
|
A278987 as a square array
| 0 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1
| | 0 | 1 | 1 | 4 | 11 | 26 | 57 | 120 | 247 | 502 | 1013
| | 0 | 1 | 1 | 4 | 11 | 41 | 162 | 610 | 2165 | 7327
| | 0 | 1 | 1 | 4 | 11 | 41 | 162 | 715 | 3425
| | 0 | 1 | 1 | 4 | 11 | 41 | 162 | 715
| | 0 | 1 | 1 | 4 | 11 | 41 | 162
| | 0 | 1 | 1 | 4 | 11 | 41
| | 0 | 1 | 1 | 4 | 11
| | 0 | 1 | 1 | 4
| | 0 | 1 | 1
| | 0 | 1
| | 0
|
A278987 as an upper right triangle
| 0 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1
| | 0 | 1 | 1 | 4 | 11 | 26 | 57 | 120 | 247 | 502 | 1013
| | | 0 | 1 | 1 | 4 | 11 | 41 | 162 | 610 | 2165 | 7327
| | | | 0 | 1 | 1 | 4 | 11 | 41 | 162 | 715 | 3425
| | | | | 0 | 1 | 1 | 4 | 11 | 41 | 162 | 715
| | | | | | 0 | 1 | 1 | 4 | 11 | 41 | 162
| | | | | | | 0 | 1 | 1 | 4 | 11 | 41
| | | | | | | | 0 | 1 | 1 | 4 | 11
| | | | | | | | | 0 | 1 | 1 | 4
| | | | | | | | | | 0 | 1 | 1
| | | | | | | | | | | 0 | 1
| | | | | | | | | | | | 0
|
|
