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| n | a(n) |
|---|---|
| 10 | 1 |
| 11 | 13 |
| 12 | 117 |
| 13 | 928 |
| 14 | 7125 |
| 15 | 55527 |
| 16 | 451472 |
| 17 | 3896347 |
| 18 | 36098855 |
| 19 | 361638248 |
| 20 | 3932908263 |
| 21 | 46483325765 |
| 22 | 596325240445 |
| 23 | 8278698772954 |
| 24 | 123863754811374 |
| 25 | 1988038987565688 |
| 26 | 34070987657660446 |
| 27 | 620747700139873322 |
| 28 | 11975106447284305656 |
| 29 | 243741719070454243530 |
[1,13,117,928,7125,55527,451472,3896347,36098855, 361638248,3932908263,46483325765,596325240445, 8278698772954,123863754811374,1988038987565688, 34070987657660446,620747700139873322, 11975106447284305656,243741719070454243530] |