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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1260 |
| 2 | 397530 |
| 3 | 56007420 |
| 4 | 4473493290 |
| 5 | 231169970556 |
| 6 | 8410030153770 |
| 7 | 228497569705260 |
| 8 | 4843702165221990 |
| 9 | 82862496597685980 |
| 10 | 1175204732233352562 |
| 11 | 14124686337489935340 |
| 12 | 146512211150601025170 |
[1,1260,397530,56007420,4473493290,231169970556, 8410030153770,228497569705260,4843702165221990, 82862496597685980,1175204732233352562, 14124686337489935340,146512211150601025170] |