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| n | a(n) |
|---|---|
| 1 | 2 |
| 2 | 16 |
| 3 | 84 |
| 4 | 828 |
| 5 | 9668 |
| 6 | 128292 |
| 7 | 2367656 |
| 8 | 53882188 |
| 9 | 1466226618 |
| 10 | 53206438448 |
| 11 | 2394759800657 |
| 12 | 133358534841765 |
| 13 | 9689628432751700 |
| 14 | 882639945891070144 |
| 15 | 101352502023903785258 |
| 16 | 15016562984066207345796 |
| 17 | 2813722789748877650099592 |
[2,16,84,828,9668,128292,2367656,53882188, 1466226618,53206438448,2394759800657, 133358534841765,9689628432751700, 882639945891070144,101352502023903785258, 15016562984066207345796,2813722789748877650099592] |