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| n | a(n) |
|---|---|
| 1 | 15 |
| 2 | 872 |
| 3 | 28917 |
| 4 | 801756 |
| 5 | 19506257 |
| 6 | 436619868 |
| 7 | 9260866349 |
| 8 | 189018035618 |
| 9 | 3745089514523 |
| 10 | 72455911732944 |
| 11 | 1374701479269929 |
| 12 | 25661853787702982 |
| 13 | 472513518100876173 |
| 14 | 8599155344969619012 |
| 15 | 154920888058619312423 |
| 16 | 2766592048670246327624 |
| 17 | 49026467271775768869547 |
[15,872,28917,801756,19506257,436619868, 9260866349,189018035618,3745089514523, 72455911732944,1374701479269929,25661853787702982, 472513518100876173,8599155344969619012, 154920888058619312423,2766592048670246327624, 49026467271775768869547] |