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| n | a(n) |
|---|---|
| 1 | 4 |
| 2 | 5 |
| 3 | 10 |
| 4 | 275 |
| 5 | 508 |
| 6 | 3694 |
| 7 | 5675 |
| 8 | 6562 |
| 9 | 32420 |
| 10 | 137782 |
| 11 | 295409 |
| 12 | 430645 |
| 13 | 13564046 |
| 14 | 22289981 |
| 15 | 387420490 |
| 16 | 3486784402 |
[4,5,10,275,508,3694,5675,6562,32420,137782, 295409,430645,13564046,22289981,387420490, 3486784402] |