| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 15 |
| 2 | 901 |
| 3 | 13530 |
| 4 | 812701 |
| 5 | 12204045 |
| 6 | 733055401 |
| 7 | 11008035060 |
| 8 | 661215159001 |
| 9 | 9929235420075 |
| 10 | 596415340363501 |
| 11 | 8956159340872590 |
| 12 | 537965975792718901 |
| 13 | 8078445796231656105 |
| 14 | 485244713749692085201 |
| 15 | 7286749152041612934120 |
| 16 | 437690193836246468132401 |
[1,15,901,13530,812701,12204045,733055401, 11008035060,661215159001,9929235420075, 596415340363501,8956159340872590, 537965975792718901,8078445796231656105, 485244713749692085201,7286749152041612934120, 437690193836246468132401] |