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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 6 |
| 3 | 42 |
| 4 | 60 |
| 5 | 139810 |
| 6 | 126 |
| 7 | 139620524162 |
| 8 | 2040 |
| 9 | 349524 |
| 10 | 419430 |
| 11 | 2537779500750160131246576896002 |
| 12 | 16380 |
| 13 | 44612382091907903486070965589630128805126146 |
| 14 | 418861572486 |
| 15 | 146602109610 |
| 16 | 1048560 |
[1,6,42,60,139810,126,139620524162,2040,349524, 419430,2537779500750160131246576896002,16380, 44612382091907903486070965589630128805126146, 418861572486,146602109610,1048560] |