A198261 as a triangular array
| | | | | | | | | 1 |
| | | | | | | | | 0 | | 1 |
| | | | | | | | 1 | | 0 | | 1 |
| | | | | | | 4 | | 3 | | 0 | | 1 |
| | | | | | 41 | | 16 | | 6 | | 0 | | 1 |
| | | | | 768 | | 205 | | 40 | | 10 | | 0 | | 1 |
| | | | 27449 | | 4608 | | 615 | | 80 | | 15 | | 0 | | 1 |
| | | 1887284 | | 192143 | | 16128 | | 1435 | | 140 | | 21 | | 0 | | 1 |
| | 252522481 | | 15098272 | | 768572 | | 43008 | | 2870 | | 224 | | 28 | | 0 | | 1 |
|
A198261 as a square array
1 | 0 | 1 | 4 | 41 | 768 | 27449 | 1887284 | 252522481
| 1 | 0 | 3 | 16 | 205 | 4608 | 192143 | 15098272
| 1 | 0 | 6 | 40 | 615 | 16128 | 768572
| 1 | 0 | 10 | 80 | 1435 | 43008
| 1 | 0 | 15 | 140 | 2870
| 1 | 0 | 21 | 224
| 1 | 0 | 28
| 1 | 0
| 1
|
A198261 as an upper right triangle
1 | 0 | 1 | 4 | 41 | 768 | 27449 | 1887284 | 252522481
| | 1 | 0 | 3 | 16 | 205 | 4608 | 192143 | 15098272
| | | 1 | 0 | 6 | 40 | 615 | 16128 | 768572
| | | | 1 | 0 | 10 | 80 | 1435 | 43008
| | | | | 1 | 0 | 15 | 140 | 2870
| | | | | | 1 | 0 | 21 | 224
| | | | | | | 1 | 0 | 28
| | | | | | | | 1 | 0
| | | | | | | | | 1
|
|