A008518 as a triangular array
| | | | | | | | | | | 1 |
| | | | | | | | | | | 1 | | 1 |
| | | | | | | | | | 1 | | 2 | | 1 |
| | | | | | | | | 1 | | 5 | | 5 | | 1 |
| | | | | | | | 1 | | 12 | | 22 | | 12 | | 1 |
| | | | | | | 1 | | 27 | | 92 | | 92 | | 27 | | 1 |
| | | | | | 1 | | 58 | | 359 | | 604 | | 359 | | 58 | | 1 |
| | | | | 1 | | 121 | | 1311 | | 3607 | | 3607 | | 1311 | | 121 | | 1 |
| | | | 1 | | 248 | | 4540 | | 19912 | | 31238 | | 19912 | | 4540 | | 248 | | 1 |
| | | 1 | | 503 | | 15110 | | 102842 | | 244424 | | 244424 | | 102842 | | 15110 | | 503 | | 1 |
| | 1 | | 1014 |
|
A008518 as a square array
1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1
| 1 | 2 | 5 | 12 | 27 | 58 | 121 | 248 | 503 | 1014
| 1 | 5 | 22 | 92 | 359 | 1311 | 4540 | 15110
| 1 | 12 | 92 | 604 | 3607 | 19912 | 102842
| 1 | 27 | 359 | 3607 | 31238 | 244424
| 1 | 58 | 1311 | 19912 | 244424
| 1 | 121 | 4540 | 102842
| 1 | 248 | 15110
| 1 | 503
| 1
|
A008518 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 | 1014
| | | 1 | 5 | 22 | 92 | 359 | 1311 | 4540 | 15110
| | | | 1 | 12 | 92 | 604 | 3607 | 19912 | 102842
| | | | | 1 | 27 | 359 | 3607 | 31238 | 244424
| | | | | | 1 | 58 | 1311 | 19912 | 244424
| | | | | | | 1 | 121 | 4540 | 102842
| | | | | | | | 1 | 248 | 15110
| | | | | | | | | 1 | 503
| | | | | | | | | | 1
| | | | | | | | | |
|
|