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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 15 |
| 3 | 829 |
| 4 | 113487 |
| 5 | 31137061 |
| 6 | 15015039495 |
| 7 | 11636995485949 |
| 8 | 13584094722071007 |
| 9 | 22735343245138118101 |
| 10 | 52487807127760090483575 |
| 11 | 162018777092079952134169069 |
| 12 | 651747862300297714019151918927 |
| 13 | 3344015911143306355676226376118341 |
| 14 | 21488215819992049616143504500848490855 |
[1,1,15,829,113487,31137061,15015039495, 11636995485949,13584094722071007, 22735343245138118101,52487807127760090483575, 162018777092079952134169069, 651747862300297714019151918927, 3344015911143306355676226376118341, 21488215819992049616143504500848490855] |