A181783 as a triangular array
| | | | | | | | | | | 1 |
| | | | | | | | | | | 1 | | 1 |
| | | | | | | | | | 1 | | 1 | | 1 |
| | | | | | | | | 1 | | 1 | | 2 | | 1 |
| | | | | | | | 1 | | 1 | | 5 | | 4 | | 1 |
| | | | | | | 1 | | 1 | | 16 | | 21 | | 7 | | 1 |
| | | | | | 1 | | 1 | | 65 | | 142 | | 63 | | 11 | | 1 |
| | | | | 1 | | 1 | | 326 | | 1201 | | 709 | | 151 | | 16 | | 1 |
| | | | 1 | | 1 | | 1957 | | 12336 | | 9709 | | 2521 | | 311 | | 22 | | 1 |
| | | 1 | | 1 | | 13700 | | 149989 | | 157971 | | 50045 | | 7186 | | 575 | | 29 | | 1 |
| | 1 | | 1 | | 109601 | | 2113546 | | 2993467 | | 1158871 | | 193765 | | 17536 | | 981 | | 37 | | 1 |
|
A181783 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 | 2 | 5 | 16 | 65 | 326 | 1957 | 13700 | 109601
| | 1 | 4 | 21 | 142 | 1201 | 12336 | 149989 | 2113546
| | 1 | 7 | 63 | 709 | 9709 | 157971 | 2993467
| | 1 | 11 | 151 | 2521 | 50045 | 1158871
| | 1 | 16 | 311 | 7186 | 193765
| | 1 | 22 | 575 | 17536
| | 1 | 29 | 981
| | 1 | 37
| | 1
|
A181783 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 | 2 | 5 | 16 | 65 | 326 | 1957 | 13700 | 109601
| | | | 1 | 4 | 21 | 142 | 1201 | 12336 | 149989 | 2113546
| | | | | 1 | 7 | 63 | 709 | 9709 | 157971 | 2993467
| | | | | | 1 | 11 | 151 | 2521 | 50045 | 1158871
| | | | | | | 1 | 16 | 311 | 7186 | 193765
| | | | | | | | 1 | 22 | 575 | 17536
| | | | | | | | | 1 | 29 | 981
| | | | | | | | | | 1 | 37
| | | | | | | | | | | 1
|
|
