A181644 as a triangular array
| | | | | | | | | | | 1 |
| | | | | | | | | | | 1 | | 1 |
| | | | | | | | | | 2 | | 1 | | 1 |
| | | | | | | | | 6 | | 3 | | 1 | | 1 |
| | | | | | | | 22 | | 11 | | 4 | | 1 | | 1 |
| | | | | | | 92 | | 46 | | 17 | | 5 | | 1 | | 1 |
| | | | | | 426 | | 213 | | 79 | | 24 | | 6 | | 1 | | 1 |
| | | | | 2150 | | 1075 | | 399 | | 122 | | 32 | | 7 | | 1 | | 1 |
| | | | 11708 | | 5854 | | 2173 | | 665 | | 176 | | 41 | | 8 | | 1 | | 1 |
| | | 68282 | | 34141 | | 12673 | | 3878 | | 1027 | | 242 | | 51 | | 9 | | 1 | | 1 |
| | 423948 | | 211974 | | 78683 | | 24075 | | 6373 | | 1502 |
|
A181644 as a square array
| 1 | 1 | 2 | 6 | 22 | 92 | 426 | 2150 | 11708 | 68282 | 423948
| | 1 | 1 | 3 | 11 | 46 | 213 | 1075 | 5854 | 34141 | 211974
| | 1 | 1 | 4 | 17 | 79 | 399 | 2173 | 12673 | 78683
| | 1 | 1 | 5 | 24 | 122 | 665 | 3878 | 24075
| | 1 | 1 | 6 | 32 | 176 | 1027 | 6373
| | 1 | 1 | 7 | 41 | 242 | 1502
| | 1 | 1 | 8 | 51
| | 1 | 1 | 9
| | 1 | 1
| | 1
|
A181644 as an upper right triangle
| 1 | 1 | 2 | 6 | 22 | 92 | 426 | 2150 | 11708 | 68282 | 423948
| | 1 | 1 | 3 | 11 | 46 | 213 | 1075 | 5854 | 34141 | 211974
| | | 1 | 1 | 4 | 17 | 79 | 399 | 2173 | 12673 | 78683
| | | | 1 | 1 | 5 | 24 | 122 | 665 | 3878 | 24075
| | | | | 1 | 1 | 6 | 32 | 176 | 1027 | 6373
| | | | | | 1 | 1 | 7 | 41 | 242 | 1502
| | | | | | | 1 | 1 | 8 | 51
| | | | | | | | 1 | 1 | 9
| | | | | | | | | 1 | 1
| | | | | | | | | | 1
| | | | | | | | | |
|
|
