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| n | a(n) |
|---|---|
| 3 | 2 |
| 4 | 12 |
| 5 | 788 |
| 6 | 7636 |
| 7 | 874202 |
| 8 | 10018884 |
| 9 | 1445893544 |
| 10 | 2954512034024 |
| 11 | 38700329118256 |
| 12 | 93229749133527532 |
| 13 | 17540746936557672236 |
| 14 | 243284404062970619608 |
| 15 | 47694250379410432495952 |
| 16 | 136236017676683906365850456 |
| 17 | 404504597532158799519693872144 |
| 18 | 5856120097210409121404621878992 |
| 19 | 18102352585707069737371994385420772 |
| 20 | 3894254646848417473467131712404310728 |
[2,12,788,7636,874202,10018884,1445893544, 2954512034024,38700329118256,93229749133527532, 17540746936557672236,243284404062970619608, 47694250379410432495952, 136236017676683906365850456, 404504597532158799519693872144, 5856120097210409121404621878992, 18102352585707069737371994385420772, 3894254646848417473467131712404310728] |