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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 1 |
| 3 | 1 |
| 4 | 2 |
| 5 | 1 |
| 6 | 1 |
| 7 | 6 |
| 8 | 3 |
| 9 | 1 |
| 10 | 1 |
| 11 | 20 |
| 12 | 20 |
| 13 | 4 |
| 14 | 1 |
| 15 | 1 |
| 16 | 70 |
| 17 | 175 |
| 18 | 50 |
| 19 | 5 |
| 20 | 1 |
| 21 | 1 |
| 22 | 252 |
| 23 | 1764 |
| 24 | 980 |
| 25 | 105 |
| 26 | 6 |
| 27 | 1 |
| 28 | 1 |
| 29 | 924 |
| 30 | 19404 |
| 31 | 24696 |
| 32 | 4116 |
| 33 | 196 |
| 34 | 7 |
| 35 | 1 |
| 36 | 1 |
| 37 | 3432 |
| 38 | 226512 |
| 39 | 731808 |
| 40 | 232848 |
| 41 | 14112 |
| 42 | 336 |
| 43 | 8 |
| 44 | 1 |
| 45 | 1 |
| 46 | 12870 |
| 47 | 2760615 |
| 48 | 24293412 |
| 49 | 16818516 |
| 50 | 1646568 |
| 51 | 41580 |
| 52 | 540 |
| 53 | 9 |
| 54 | 1 |
[1,1,1,1,2,1,1,6,3,1,1,20,20,4,1,1,70,175,50,5,1, 1,252,1764,980,105,6,1,1,924,19404,24696,4116,196, 7,1,1,3432,226512,731808,232848,14112,336,8,1,1, 12870,2760615,24293412,16818516,1646568,41580,540, 9,1] |