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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 336 |
| 2 | 5630688 |
| 3 | 4635182361600 |
| 4 | 187035198320488089600 |
| 5 | 369826556020831611935738265600 |
| 6 | 35832085525362833262818017603275320524800 |
| 7 | 170115000551935077294273059250893063598899496222720000 |
[1,336,5630688,4635182361600, 187035198320488089600, 369826556020831611935738265600, 35832085525362833262818017603275320524800, 17011500055193507729427305925089306359889949622272\ 0000] |