| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 7 |
| 3 | 169 |
| 4 | 10388 |
| 5 | 1324344 |
| 6 | 305668180 |
| 7 | 116145817656 |
| 8 | 67770421715800 |
| 9 | 57594670663866124 |
| 10 | 68393751368082128320 |
| 11 | 109765035421144948709232 |
| 12 | 231657098706747226470685920 |
| 13 | 628412716450312334529486247152 |
| 14 | 2149132484027947970192241804640128 |
| 15 | 9113755489596517688997731211571700256 |
[1,1,7,169,10388,1324344,305668180,116145817656, 67770421715800,57594670663866124, 68393751368082128320,109765035421144948709232, 231657098706747226470685920, 628412716450312334529486247152, 2149132484027947970192241804640128, 9113755489596517688997731211571700256] |