A221328 as a triangular array
| | | | | | | | | 1 |
| | | | | | | | | 3 | | 1 |
| | | | | | | | 7 | | 17 | | 1 |
| | | | | | | 17 | | 119 | | 99 | | 1 |
| | | | | | 41 | | 866 | | 2008 | | 577 | | 1 |
| | | | | 99 | | 6328 | | 46105 | | 33873 | | 3363 | | 1 |
| | | | 239 | | 46211 | | 1010078 | | 2460824 | | 571358 | | 19601 | | 1 |
| | | 577 | | 337274 | | 22181855 | | 162430981 | | 131347807 | | 9637322 | | 114243 | | 1 |
| | 1393 | | 2460918 | | 487335857 | | 10794156688 |
|
A221328 as a square array
| 1 | 3 | 7 | 17 | 41 | 99 | 239 | 577 | 1393
| | 1 | 17 | 119 | 866 | 6328 | 46211 | 337274 | 2460918
| | 1 | 99 | 2008 | 46105 | 1010078 | 22181855 | 487335857
| | 1 | 577 | 33873 | 2460824 | 162430981 | 10794156688
| | 1 | 3363 | 571358 | 131347807
| | 1 | 19601 | 9637322
| | 1 | 114243
| | 1
|
A221328 as an upper right triangle
| 1 | 3 | 7 | 17 | 41 | 99 | 239 | 577 | 1393
| | 1 | 17 | 119 | 866 | 6328 | 46211 | 337274 | 2460918
| | | 1 | 99 | 2008 | 46105 | 1010078 | 22181855 | 487335857
| | | | 1 | 577 | 33873 | 2460824 | 162430981 | 10794156688
| | | | | 1 | 3363 | 571358 | 131347807
| | | | | | 1 | 19601 | 9637322
| | | | | | | 1 | 114243
| | | | | | | | 1
| | | | | | | |
|
|
