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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 0 |
| 3 | 1 |
| 4 | 1 |
| 5 | 1 |
| 6 | 1 |
| 7 | 2 |
| 8 | 2 |
| 9 | 2 |
| 10 | 1 |
| 11 | 3 |
| 12 | 5 |
| 13 | 6 |
| 14 | 9 |
| 15 | 1 |
| 16 | 4 |
| 17 | 10 |
| 18 | 16 |
| 19 | 24 |
| 20 | 44 |
| 21 | 1 |
| 22 | 5 |
| 23 | 17 |
| 24 | 38 |
| 25 | 65 |
| 26 | 120 |
| 27 | 265 |
| 28 | 1 |
| 29 | 6 |
| 30 | 26 |
| 31 | 78 |
| 32 | 168 |
| 33 | 326 |
| 34 | 720 |
| 35 | 1854 |
| 36 | 1 |
| 37 | 7 |
| 38 | 37 |
| 39 | 142 |
| 40 | 393 |
| 41 | 872 |
| 42 | 1957 |
| 43 | 5040 |
| 44 | 14833 |
| 45 | 1 |
| 46 | 8 |
| 47 | 50 |
| 48 | 236 |
| 49 | 824 |
| 50 | 2208 |
| 51 | 5296 |
| 52 | 13700 |
| 53 | 40320 |
| 54 | 133496 |
| 55 | 1 |
| 56 | 9 |
| 57 | 65 |
| 58 | 366 |
| 59 | 1569 |
| 60 | 5144 |
| 61 | 13977 |
| 62 | 37200 |
| 63 | 109601 |
| 64 | 362880 |
| 65 | 1334961 |
[1,1,0,1,1,1,1,2,2,2,1,3,5,6,9,1,4,10,16,24,44,1, 5,17,38,65,120,265,1,6,26,78,168,326,720,1854,1,7, 37,142,393,872,1957,5040,14833,1,8,50,236,824, 2208,5296,13700,40320,133496,1,9,65,366,1569,5144, 13977,37200,109601,362880,1334961] |