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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 25 |
| 2 | 431 |
| 3 | 6365 |
| 4 | 86511 |
| 5 | 1117605 |
| 6 | 13957591 |
| 7 | 170189245 |
| 8 | 2038704671 |
| 9 | 24092243285 |
| 10 | 281680643751 |
| 11 | 3265150951725 |
| 12 | 37583315950831 |
| 13 | 430083097386565 |
| 14 | 4897580558961911 |
| 15 | 55540052099419805 |
| 16 | 627607236896972991 |
[1,25,431,6365,86511,1117605,13957591,170189245, 2038704671,24092243285,281680643751,3265150951725, 37583315950831,430083097386565,4897580558961911, 55540052099419805,627607236896972991] |