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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 8 |
| 3 | 272 |
| 4 | 19480 |
| 5 | 2353568 |
| 6 | 429016872 |
| 7 | 110046546096 |
| 8 | 37825128764472 |
| 9 | 16793443888112960 |
| 10 | 9358539226503013960 |
| 11 | 6397425528561882140240 |
| 12 | 5264539843826571207135320 |
| 13 | 5134140710880677886077086432 |
| 14 | 5855644914993764696284947092840 |
[1,1,8,272,19480,2353568,429016872,110046546096, 37825128764472,16793443888112960, 9358539226503013960,6397425528561882140240, 5264539843826571207135320, 5134140710880677886077086432, 5855644914993764696284947092840] |