A091378 as a triangular array
| | | | | | | | 1 |
| | | | | | | | 1 | | 1 |
| | | | | | | 1 | | 2 | | 1 |
| | | | | | 1 | | 5 | | 5 | | 1 |
| | | | | 1 | | 14 | | 96 | | 14 | | 1 |
| | | | 1 | | 42 | | 6560 | | 6560 | | 42 | | 1 |
| | | 1 | | 132 | | 1738535 | | 771496766 | | 1738535 | | 132 | | 1 |
| | 1 | | 429 | | 2347585784 |
|
A091378 as a square array
| 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1
| | 1 | 2 | 5 | 14 | 42 | 132 | 429
| | 1 | 5 | 96 | 6560 | 1738535 | 2347585784
| | 1 | 14 | 6560 | 771496766
| | 1 | 42 | 1738535
| | 1 | 132
| | 1
|
A091378 as an upper right triangle
| 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1
| | 1 | 2 | 5 | 14 | 42 | 132 | 429
| | | 1 | 5 | 96 | 6560 | 1738535 | 2347585784
| | | | 1 | 14 | 6560 | 771496766
| | | | | 1 | 42 | 1738535
| | | | | | 1 | 132
| | | | | | | 1
| | | | | | |
|
|
