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| n | a(n) |
|---|---|
| 1 | 15 |
| 2 | 2795 |
| 3 | 667478 |
| 4 | 163422914 |
| 5 | 40039156736 |
| 6 | 9810325806914 |
| 7 | 2403711876698218 |
| 8 | 588954110860577394 |
| 9 | 144304709913279198696 |
| 10 | 35357337571782719886214 |
| 11 | 8663205247528271356492160 |
| 12 | 2122646395773319892200238358 |
[15,2795,667478,163422914,40039156736, 9810325806914,2403711876698218,588954110860577394, 144304709913279198696,35357337571782719886214, 8663205247528271356492160, 2122646395773319892200238358] |