A181039 as a triangular array
| | | | | | | | | | | 1 |
| | | | | | | | | | | 1 | | 1 |
| | | | | | | | | | 1 | | 2 | | 1 |
| | | | | | | | | 1 | | 3 | | 3 | | 1 |
| | | | | | | | 1 | | 6 | | 6 | | 6 | | 1 |
| | | | | | | 1 | | 10 | | 18 | | 18 | | 10 | | 1 |
| | | | | | 1 | | 19 | | 41 | | 108 | | 41 | | 19 | | 1 |
| | | | | 1 | | 33 | | 112 | | 410 | | 410 | | 112 | | 33 | | 1 |
| | | | 1 | | 61 | | 269 | | 2128 | | 2262 | | 2128 | | 269 | | 61 | | 1 |
| | | 1 | | 108 | | 703 | | 8877 | | 18708 | | 18708 | | 8877 | | 703 | | 108 | | 1 |
| | 1 | | 197 | | 1729 | | 42883 | | 116416 | | 280212 | | 116416 | | 42883 |
|
A181039 as a square array
| 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1
| | 1 | 2 | 3 | 6 | 10 | 19 | 33 | 61 | 108 | 197
| | 1 | 3 | 6 | 18 | 41 | 112 | 269 | 703 | 1729
| | 1 | 6 | 18 | 108 | 410 | 2128 | 8877 | 42883
| | 1 | 10 | 41 | 410 | 2262 | 18708 | 116416
| | 1 | 19 | 112 | 2128 | 18708 | 280212
| | 1 | 33 | 269 | 8877 | 116416
| | 1 | 61 | 703 | 42883
| | 1 | 108
| | 1
|
A181039 as an upper right triangle
| 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1
| | 1 | 2 | 3 | 6 | 10 | 19 | 33 | 61 | 108 | 197
| | | 1 | 3 | 6 | 18 | 41 | 112 | 269 | 703 | 1729
| | | | 1 | 6 | 18 | 108 | 410 | 2128 | 8877 | 42883
| | | | | 1 | 10 | 41 | 410 | 2262 | 18708 | 116416
| | | | | | 1 | 19 | 112 | 2128 | 18708 | 280212
| | | | | | | 1 | 33 | 269 | 8877 | 116416
| | | | | | | | 1 | 61 | 703 | 42883
| | | | | | | | | 1 | 108
| | | | | | | | | | 1
| | | | | | | | | |
|
|
