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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 2 |
| 2 | 6 |
| 3 | 30 |
| 4 | 42 |
| 5 | 30 |
| 6 | 66 |
| 7 | 2730 |
| 8 | 6 |
| 9 | 510 |
| 10 | 798 |
| 11 | 330 |
| 12 | 138 |
| 13 | 2730 |
| 14 | 6 |
| 15 | 870 |
| 16 | 14322 |
| 17 | 510 |
| 18 | 6 |
| 19 | 1919190 |
| 20 | 6 |
| 21 | 13530 |
| 22 | 1806 |
| 23 | 690 |
| 24 | 282 |
| 25 | 46410 |
| 26 | 66 |
| 27 | 1590 |
| 28 | 798 |
| 29 | 870 |
| 30 | 354 |
| 31 | 56786730 |
| 32 | 6 |
| 33 | 510 |
| 34 | 64722 |
| 35 | 30 |
| 36 | 4686 |
| 37 | 140100870 |
| 38 | 6 |
| 39 | 30 |
| 40 | 3318 |
| 41 | 230010 |
| 42 | 498 |
| 43 | 3404310 |
| 44 | 6 |
| 45 | 61410 |
| 46 | 272118 |
| 47 | 1410 |
| 48 | 6 |
| 49 | 4501770 |
[1,2,6,30,42,30,66,2730,6,510,798,330,138,2730,6, 870,14322,510,6,1919190,6,13530,1806,690,282, 46410,66,1590,798,870,354,56786730,6,510,64722,30, 4686,140100870,6,30,3318,230010,498,3404310,6, 61410,272118,1410,6,4501770] |