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| n | a(n) |
|---|---|
| 1 | 159 |
| 2 | 1034 |
| 3 | 6724 |
| 4 | 43727 |
| 5 | 284360 |
| 6 | 1849215 |
| 7 | 12025596 |
| 8 | 78203437 |
| 9 | 508563345 |
| 10 | 3307229006 |
| 11 | 21507180645 |
| 12 | 139862954332 |
| 13 | 909540228150 |
| 14 | 5914814473647 |
| 15 | 38464522156756 |
| 16 | 250137932701244 |
| 17 | 1626667429300337 |
| 18 | 10578351299907331 |
[159,1034,6724,43727,284360,1849215,12025596, 78203437,508563345,3307229006,21507180645, 139862954332,909540228150,5914814473647, 38464522156756,250137932701244,1626667429300337, 10578351299907331] |