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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 1 |
| 3 | 1 |
| 4 | 1 |
| 5 | 5 |
| 6 | 1 |
| 7 | 19 |
| 8 | 13 |
| 9 | 300 |
| 10 | 253 |
| 11 | 9196 |
| 12 | 2685 |
| 13 | 408268 |
| 14 | 46561 |
| 15 | 21554860 |
[1,1,1,1,5,1,19,13,300,253,9196,2685,408268,46561, 21554860] |