A088990 as a triangular array
| | | | | | | | | 1 |
| | | | | | | | | 0 | | 1 |
| | | | | | | | 0 | | 1 | | 1 |
| | | | | | | 0 | | 1 | | 8 | | 1 |
| | | | | | 0 | | 1 | | 51 | | 51 | | 1 |
| | | | | 0 | | 1 | | 310 | | 1194 | | 310 | | 1 |
| | | | 0 | | 1 | | 1865 | | 21790 | | 21790 | | 1865 | | 1 |
| | | 0 | | 1 | | 11196 | | 357975 | | 975656 | | 357975 | | 11196 | | 1 |
| | 0 | | 1 | | 67183 | | 5603421 | | 35471987 | | 35471987 | | 5603421 | | 67183 | | 1 |
|
A088990 as a square array
| 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0
| | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1
| | 1 | 8 | 51 | 310 | 1865 | 11196 | 67183
| | 1 | 51 | 1194 | 21790 | 357975 | 5603421
| | 1 | 310 | 21790 | 975656 | 35471987
| | 1 | 1865 | 357975 | 35471987
| | 1 | 11196 | 5603421
| | 1 | 67183
| | 1
|
A088990 as an upper right triangle
| 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0
| | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1
| | | 1 | 8 | 51 | 310 | 1865 | 11196 | 67183
| | | | 1 | 51 | 1194 | 21790 | 357975 | 5603421
| | | | | 1 | 310 | 21790 | 975656 | 35471987
| | | | | | 1 | 1865 | 357975 | 35471987
| | | | | | | 1 | 11196 | 5603421
| | | | | | | | 1 | 67183
| | | | | | | | | 1
|
|
