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| n | a(n) |
|---|---|
| 0 | 15 |
| 1 | 403 |
| 2 | 31031 |
| 3 | 3543517 |
| 4 | 464378915 |
| 5 | 64178802493 |
| 6 | 9070067614091 |
| 7 | 1294620020196997 |
| 8 | 185637589303481315 |
| 9 | 26676789058694821933 |
| 10 | 3837572548050547502651 |
| 11 | 552334249790915518944277 |
| 12 | 79516409977044969123349715 |
[15,403,31031,3543517,464378915,64178802493, 9070067614091,1294620020196997,185637589303481315, 26676789058694821933,3837572548050547502651, 552334249790915518944277, 79516409977044969123349715] |