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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 3 |
| 3 | 19 |
| 4 | 277 |
| 5 | 8641 |
| 6 | 578949 |
| 7 | 83316385 |
| 8 | 25753389181 |
| 9 | 17098272199297 |
| 10 | 24382819596721629 |
| 11 | 74684329652984094451 |
| 12 | 491347682599497451569523 |
| 13 | 6943240361573523613067995729 |
| 14 | 210741152533202801182666172606913 |
| 15 | 13738849457010997118546333815068560833 |
| 16 | 1923823572225984354415961546862346889944243 |
[1,1,3,19,277,8641,578949,83316385,25753389181, 17098272199297,24382819596721629, 74684329652984094451,491347682599497451569523, 6943240361573523613067995729, 210741152533202801182666172606913, 13738849457010997118546333815068560833, 1923823572225984354415961546862346889944243] |