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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 6 |
| 2 | 1 |
| 3 | 30 |
| 4 | 5 |
| 5 | 1 |
| 6 | 420 |
| 7 | 70 |
| 8 | 14 |
| 9 | 3 |
| 10 | 1260 |
| 11 | 210 |
| 12 | 42 |
| 13 | 9 |
| 14 | 2 |
| 15 | 13860 |
| 16 | 2310 |
| 17 | 462 |
| 18 | 99 |
| 19 | 22 |
| 20 | 5 |
| 21 | 180180 |
| 22 | 30030 |
| 23 | 6006 |
| 24 | 1287 |
| 25 | 286 |
| 26 | 65 |
| 27 | 15 |
| 28 | 360360 |
| 29 | 60060 |
| 30 | 12012 |
| 31 | 2574 |
| 32 | 572 |
| 33 | 130 |
| 34 | 30 |
| 35 | 7 |
| 36 | 6126120 |
| 37 | 1021020 |
| 38 | 204204 |
| 39 | 43758 |
| 40 | 9724 |
| 41 | 2210 |
| 42 | 510 |
| 43 | 119 |
| 44 | 28 |
| 45 | 116396280 |
| 46 | 19399380 |
| 47 | 3879876 |
| 48 | 831402 |
| 49 | 184756 |
| 50 | 41990 |
| 51 | 9690 |
| 52 | 2261 |
| 53 | 532 |
| 54 | 126 |
[1,6,1,30,5,1,420,70,14,3,1260,210,42,9,2,13860, 2310,462,99,22,5,180180,30030,6006,1287,286,65,15, 360360,60060,12012,2574,572,130,30,7,6126120, 1021020,204204,43758,9724,2210,510,119,28, 116396280,19399380,3879876,831402,184756,41990, 9690,2261,532,126] |