A176420 as a triangular array
| | | | | | | | | | | 1 |
| | | | | | | | | | | 1 | | 1 |
| | | | | | | | | | 1 | | 2 | | 1 |
| | | | | | | | | 1 | | 5 | | 5 | | 1 |
| | | | | | | | 1 | | 12 | | 30 | | 12 | | 1 |
| | | | | | | 1 | | 27 | | 146 | | 146 | | 27 | | 1 |
| | | | | | 1 | | 58 | | 637 | | 1376 | | 637 | | 58 | | 1 |
| | | | | 1 | | 121 | | 2647 | | 11777 | | 11777 | | 2647 | | 121 | | 1 |
| | | | 1 | | 248 | | 10768 | | 97100 | | 200718 | | 97100 | | 10768 | | 248 | | 1 |
| | | 1 | | 503 | | 43400 | | 787952 | | 3309622 | | 3309622 | | 787952 | | 43400 | | 503 | | 1 |
| | 1 |
|
A176420 as a square array
| 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1
| | 1 | 2 | 5 | 12 | 27 | 58 | 121 | 248 | 503
| | 1 | 5 | 30 | 146 | 637 | 2647 | 10768 | 43400
| | 1 | 12 | 146 | 1376 | 11777 | 97100 | 787952
| | 1 | 27 | 637 | 11777 | 200718 | 3309622
| | 1 | 58 | 2647 | 97100 | 3309622
| | 1 | 121 | 10768 | 787952
| | 1 | 248 | 43400
| | 1 | 503
| | 1
|
A176420 as an upper right triangle
| 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1
| | 1 | 2 | 5 | 12 | 27 | 58 | 121 | 248 | 503
| | | 1 | 5 | 30 | 146 | 637 | 2647 | 10768 | 43400
| | | | 1 | 12 | 146 | 1376 | 11777 | 97100 | 787952
| | | | | 1 | 27 | 637 | 11777 | 200718 | 3309622
| | | | | | 1 | 58 | 2647 | 97100 | 3309622
| | | | | | | 1 | 121 | 10768 | 787952
| | | | | | | | 1 | 248 | 43400
| | | | | | | | | 1 | 503
| | | | | | | | | | 1
| | | | | | | | | |
|
|
