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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 1 |
| 3 | 1 |
| 4 | 2 |
| 5 | 1 |
| 6 | 3 |
| 7 | 1 |
| 8 | 4 |
| 9 | 1 |
| 10 | 5 |
| 11 | 1 |
| 12 | 6 |
| 13 | 1 |
| 14 | 7 |
| 15 | 1 |
| 16 | 8 |
| 17 | 1 |
| 18 | 1 |
| 19 | 9 |
| 20 | 9 |
| 21 | 1 |
| 22 | 10 |
| 23 | 45 |
| 24 | 1 |
| 25 | 11 |
| 26 | 165 |
| 27 | 1 |
| 28 | 12 |
| 29 | 495 |
| 30 | 1 |
| 31 | 13 |
| 32 | 1287 |
| 33 | 1 |
| 34 | 14 |
| 35 | 3003 |
| 36 | 1 |
| 37 | 15 |
| 38 | 6435 |
| 39 | 1 |
| 40 | 16 |
| 41 | 12870 |
| 42 | 1 |
| 43 | 17 |
| 44 | 24310 |
| 45 | 1 |
| 46 | 18 |
| 47 | 43758 |
| 48 | 1 |
| 49 | 19 |
| 50 | 75582 |
| 51 | 1 |
| 52 | 20 |
| 53 | 125970 |
[1,1,1,1,2,1,3,1,4,1,5,1,6,1,7,1,8,1,1,9,9,1,10, 45,1,11,165,1,12,495,1,13,1287,1,14,3003,1,15, 6435,1,16,12870,1,17,24310,1,18,43758,1,19,75582, 1,20,125970] |