A201638 as a triangular array
| | | | | | | | | | 1 |
| | | | | | | | | | 3 | | 1 |
| | | | | | | | | 12 | | 6 | | 1 |
| | | | | | | | 54 | | 33 | | 9 | | 1 |
| | | | | | | 261 | | 180 | | 63 | | 12 | | 1 |
| | | | | | 1323 | | 990 | | 405 | | 102 | | 15 | | 1 |
| | | | | 6939 | | 5508 | | 2511 | | 756 | | 150 | | 18 | | 1 |
| | | | 37341 | | 30996 | | 15309 | | 5229 | | 1260 | | 207 | | 21 | | 1 |
| | | 205011 | | 176256 | | 92610 | | 34776 | | 9630 | | 1944 | | 273 | | 24 | | 1 |
| | 1143801 | | 1011609 | | 558414 | | 225828 | | 69498 | | 16281 | | 2835 | | 348 | | 27 | | 1 |
|
A201638 as a square array
1 | 3 | 12 | 54 | 261 | 1323 | 6939 | 37341 | 205011 | 1143801
| 1 | 6 | 33 | 180 | 990 | 5508 | 30996 | 176256 | 1011609
| 1 | 9 | 63 | 405 | 2511 | 15309 | 92610 | 558414
| 1 | 12 | 102 | 756 | 5229 | 34776 | 225828
| 1 | 15 | 150 | 1260 | 9630 | 69498
| 1 | 18 | 207 | 1944 | 16281
| 1 | 21 | 273 | 2835
| 1 | 24 | 348
| 1 | 27
| 1
|
A201638 as an upper right triangle
1 | 3 | 12 | 54 | 261 | 1323 | 6939 | 37341 | 205011 | 1143801
| | 1 | 6 | 33 | 180 | 990 | 5508 | 30996 | 176256 | 1011609
| | | 1 | 9 | 63 | 405 | 2511 | 15309 | 92610 | 558414
| | | | 1 | 12 | 102 | 756 | 5229 | 34776 | 225828
| | | | | 1 | 15 | 150 | 1260 | 9630 | 69498
| | | | | | 1 | 18 | 207 | 1944 | 16281
| | | | | | | 1 | 21 | 273 | 2835
| | | | | | | | 1 | 24 | 348
| | | | | | | | | 1 | 27
| | | | | | | | | | 1
|
|