A191781 as a triangular array
| | | | | | | | | | | | | 1 |
| | | | | | | | | | | | | 1 | | 1 |
| | | | | | | | | | | | 1 | | 1 | | 1 |
| | | | | | | | | | | 2 | | 2 | | 1 | | 1 |
| | | | | | | | | | 3 | | 3 | | 2 | | 1 | | 1 |
| | | | | | | | | 6 | | 6 | | 4 | | 2 | | 1 | | 1 |
| | | | | | | | 10 | | 10 | | 7 | | 4 | | 2 | | 1 | | 1 |
| | | | | | | 20 | | 20 | | 14 | | 8 | | 4 | | 2 | | 1 | | 1 |
| | | | | | 35 | | 35 | | 25 | | 15 | | 8 | | 4 | | 2 | | 1 | | 1 |
| | | | | 70 | | 70 | | 50 | | 30 | | 16 | | 8 | | 4 | | 2 | | 1 | | 1 |
| | | | 126 | | 126 | | 91 | | 56 | | 31 | | 16 | | 8 | | 4 | | 2 | | 1 | | 1 |
| | | 252 | | 252 | | 182 | | 112 | | 62 | | 32 | | 16 | | 8 | | 4 | | 2 | | 1 | | 1 |
| | 462 | | 462 | | 336 | | 210 | | 119 | | 63 | | 32 | | 16 | | 8 | | 4 | | 2 | | 1 | | 1 |
|
A191781 as a square array
1 | 1 | 1 | 2 | 3 | 6 | 10 | 20 | 35 | 70 | 126 | 252 | 462
| 1 | 1 | 2 | 3 | 6 | 10 | 20 | 35 | 70 | 126 | 252 | 462
| 1 | 1 | 2 | 4 | 7 | 14 | 25 | 50 | 91 | 182 | 336
| 1 | 1 | 2 | 4 | 8 | 15 | 30 | 56 | 112 | 210
| 1 | 1 | 2 | 4 | 8 | 16 | 31 | 62 | 119
| 1 | 1 | 2 | 4 | 8 | 16 | 32 | 63
| 1 | 1 | 2 | 4 | 8 | 16 | 32
| 1 | 1 | 2 | 4 | 8 | 16
| 1 | 1 | 2 | 4 | 8
| 1 | 1 | 2 | 4
| 1 | 1 | 2
| 1 | 1
| 1
|
A191781 as an upper right triangle
1 | 1 | 1 | 2 | 3 | 6 | 10 | 20 | 35 | 70 | 126 | 252 | 462
| | 1 | 1 | 2 | 3 | 6 | 10 | 20 | 35 | 70 | 126 | 252 | 462
| | | 1 | 1 | 2 | 4 | 7 | 14 | 25 | 50 | 91 | 182 | 336
| | | | 1 | 1 | 2 | 4 | 8 | 15 | 30 | 56 | 112 | 210
| | | | | 1 | 1 | 2 | 4 | 8 | 16 | 31 | 62 | 119
| | | | | | 1 | 1 | 2 | 4 | 8 | 16 | 32 | 63
| | | | | | | 1 | 1 | 2 | 4 | 8 | 16 | 32
| | | | | | | | 1 | 1 | 2 | 4 | 8 | 16
| | | | | | | | | 1 | 1 | 2 | 4 | 8
| | | | | | | | | | 1 | 1 | 2 | 4
| | | | | | | | | | | 1 | 1 | 2
| | | | | | | | | | | | 1 | 1
| | | | | | | | | | | | | 1
|
|