The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 1 |
| 3 | 1 |
| 4 | 1 |
| 5 | 1 |
| 6 | 1 |
| 7 | 1 |
| 8 | 2 |
| 9 | 1 |
| 10 | 1 |
| 11 | 1 |
| 12 | 3 |
| 13 | 6 |
| 14 | 1 |
| 15 | 1 |
| 16 | 1 |
| 17 | 4 |
| 18 | 13 |
| 19 | 24 |
| 20 | 1 |
| 21 | 1 |
| 22 | 1 |
| 23 | 5 |
| 24 | 22 |
| 25 | 73 |
| 26 | 120 |
| 27 | 1 |
| 28 | 1 |
| 29 | 1 |
| 30 | 6 |
| 31 | 33 |
| 32 | 154 |
| 33 | 501 |
| 34 | 720 |
| 35 | 1 |
| 36 | 1 |
| 37 | 1 |
| 38 | 7 |
| 39 | 46 |
| 40 | 273 |
| 41 | 1306 |
| 42 | 4051 |
| 43 | 5040 |
| 44 | 1 |
| 45 | 1 |
| 46 | 1 |
| 47 | 8 |
| 48 | 61 |
| 49 | 436 |
| 50 | 2721 |
| 51 | 12976 |
| 52 | 37633 |
| 53 | 40320 |
| 54 | 1 |
| 55 | 1 |
| 56 | 1 |
| 57 | 9 |
| 58 | 78 |
| 59 | 649 |
| 60 | 4956 |
| 61 | 31701 |
| 62 | 147484 |
| 63 | 394353 |
| 64 | 362880 |
| 65 | 1 |
[1,1,1,1,1,1,1,1,2,1,1,1,3,6,1,1,1,4,13,24,1,1,1, 5,22,73,120,1,1,1,6,33,154,501,720,1,1,1,7,46,273, 1306,4051,5040,1,1,1,8,61,436,2721,12976,37633, 40320,1,1,1,9,78,649,4956,31701,147484,394353, 362880,1] |