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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | -25 |
| 2 | 675 |
| 3 | -19575 |
| 4 | 606225 |
| 5 | -19944225 |
| 6 | 693835875 |
| 7 | -25422933375 |
| 8 | 977745218625 |
| 9 | -39350424479625 |
| 10 | 1652904664495875 |
| 11 | -72294275991774375 |
| 12 | 3285576793503860625 |
| 13 | -154866859897225100625 |
| 14 | 7558086937740656191875 |
| 15 | -381335852895175582779375 |
[1,-25,675,-19575,606225,-19944225,693835875, -25422933375,977745218625,-39350424479625, 1652904664495875,-72294275991774375, 3285576793503860625,-154866859897225100625, 7558086937740656191875,-381335852895175582779375] |