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| n | a(n) |
|---|---|
| 1 | 256 |
| 2 | 21140 |
| 3 | 1278672 |
| 4 | 111242648 |
| 5 | 18209383140 |
| 6 | 5567891627984 |
| 7 | 3548796740666104 |
| 8 | 4531526542739275184 |
| 9 | 11370221346994594652040 |
| 10 | 60827254093069565745485584 |
| 11 | 666208249155797450019782873520 |
| 12 | 14561819290550204381850004841878000 |
[256,21140,1278672,111242648,18209383140, 5567891627984,3548796740666104, 4531526542739275184,11370221346994594652040, 60827254093069565745485584, 666208249155797450019782873520, 14561819290550204381850004841878000] |