A287641 as a triangular array
| | | | | | | | | | | | 1 |
| | | | | | | | | | | | 1 | | 1 |
| | | | | | | | | | | 1 | | 1 | | 1 |
| | | | | | | | | | 1 | | 1 | | 2 | | 1 |
| | | | | | | | | 1 | | 1 | | 2 | | 5 | | 1 |
| | | | | | | | 1 | | 1 | | 2 | | 5 | | 14 | | 1 |
| | | | | | | 1 | | 1 | | 2 | | 5 | | 15 | | 42 | | 1 |
| | | | | | 1 | | 1 | | 2 | | 5 | | 15 | | 51 | | 132 | | 1 |
| | | | | 1 | | 1 | | 2 | | 5 | | 15 | | 52 | | 191 | | 429 | | 1 |
| | | | 1 | | 1 | | 2 | | 5 | | 15 | | 52 | | 202 | | 773 | | 1430 | | 1 |
| | | 1 | | 1 | | 2 | | 5 | | 15 | | 52 | | 203 | | 861 | | 3336 | | 4862 | | 1 |
| | 1 | | 1 | | 2 | | 5 | | 15 | | 52 | | 203 | | 876 | | 3970 | | 15207 | | 16796 | | 1 |
|
A287641 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 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2
| | 1 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5
| | 1 | 14 | 15 | 15 | 15 | 15 | 15 | 15
| | 1 | 42 | 51 | 52 | 52 | 52 | 52
| | 1 | 132 | 191 | 202 | 203 | 203
| | 1 | 429 | 773 | 861 | 876
| | 1 | 1430 | 3336 | 3970
| | 1 | 4862 | 15207
| | 1 | 16796
| | 1
|
A287641 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 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2
| | | | 1 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5
| | | | | 1 | 14 | 15 | 15 | 15 | 15 | 15 | 15
| | | | | | 1 | 42 | 51 | 52 | 52 | 52 | 52
| | | | | | | 1 | 132 | 191 | 202 | 203 | 203
| | | | | | | | 1 | 429 | 773 | 861 | 876
| | | | | | | | | 1 | 1430 | 3336 | 3970
| | | | | | | | | | 1 | 4862 | 15207
| | | | | | | | | | | 1 | 16796
| | | | | | | | | | | | 1
|
|
