A055800 as a triangular array
| | | | | | | | | | | | | 1 |
| | | | | | | | | | | | | 1 | | 0 |
| | | | | | | | | | | | 1 | | 1 | | 0 |
| | | | | | | | | | | 1 | | 1 | | 0 | | 0 |
| | | | | | | | | | 1 | | 1 | | 1 | | 1 | | 0 |
| | | | | | | | | 1 | | 1 | | 1 | | 1 | | 0 | | 0 |
| | | | | | | | 1 | | 1 | | 1 | | 2 | | 2 | | 1 | | 0 |
| | | | | | | 1 | | 1 | | 1 | | 2 | | 2 | | 1 | | 0 | | 0 |
| | | | | | 1 | | 1 | | 1 | | 2 | | 3 | | 4 | | 3 | | 1 | | 0 |
| | | | | 1 | | 1 | | 1 | | 2 | | 3 | | 4 | | 3 | | 1 | | 0 | | 0 |
| | | | 1 | | 1 | | 1 | | 2 | | 3 | | 5 | | 7 | | 7 | | 4 | | 1 | | 0 |
| | | 1 | | 1 | | 1 | | 2 | | 3 | | 5 | | 7 | | 7 | | 4 | | 1 | | 0 | | 0 |
| | 1 | | 1 | | 1 | | 2 | | 3 | | 5 | | 8 | | 12 | | 14 | | 11 | | 5 | | 1 | | 0 |
|
A055800 as a square array
| 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1
| | 0 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1
| | 0 | 0 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1
| | 0 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | 2
| | 0 | 0 | 2 | 2 | 3 | 3 | 3 | 3 | 3
| | 0 | 1 | 1 | 4 | 4 | 5 | 5 | 5
| | 0 | 0 | 3 | 3 | 7 | 7 | 8
| | 0 | 1 | 1 | 7 | 7 | 12
| | 0 | 0 | 4 | 4 | 14
| | 0 | 1 | 1 | 11
| | 0 | 0 | 5
| | 0 | 1
| | 0
|
A055800 as an upper right triangle
| 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1
| | 0 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1
| | | 0 | 0 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1
| | | | 0 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | 2
| | | | | 0 | 0 | 2 | 2 | 3 | 3 | 3 | 3 | 3
| | | | | | 0 | 1 | 1 | 4 | 4 | 5 | 5 | 5
| | | | | | | 0 | 0 | 3 | 3 | 7 | 7 | 8
| | | | | | | | 0 | 1 | 1 | 7 | 7 | 12
| | | | | | | | | 0 | 0 | 4 | 4 | 14
| | | | | | | | | | 0 | 1 | 1 | 11
| | | | | | | | | | | 0 | 0 | 5
| | | | | | | | | | | | 0 | 1
| | | | | | | | | | | | | 0
|
|
