The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 1 |
| 3 | 2 |
| 4 | 6 |
| 5 | 1 |
| 6 | 6 |
| 7 | 38 |
| 8 | 15 |
| 9 | 1 |
| 10 | 24 |
| 11 | 272 |
| 12 | 188 |
| 13 | 28 |
| 14 | 1 |
| 15 | 120 |
| 16 | 2200 |
| 17 | 2340 |
| 18 | 580 |
| 19 | 45 |
| 20 | 1 |
| 21 | 720 |
| 22 | 19920 |
| 23 | 30280 |
| 24 | 11040 |
| 25 | 1390 |
| 26 | 66 |
| 27 | 1 |
| 28 | 5040 |
| 29 | 199920 |
| 30 | 413560 |
| 31 | 206920 |
| 32 | 37450 |
| 33 | 2842 |
| 34 | 91 |
| 35 | 1 |
| 36 | 40320 |
| 37 | 2204160 |
| 38 | 5989760 |
| 39 | 3931200 |
| 40 | 955920 |
| 41 | 102816 |
| 42 | 5208 |
| 43 | 120 |
| 44 | 1 |
[1,1,1,2,6,1,6,38,15,1,24,272,188,28,1,120,2200, 2340,580,45,1,720,19920,30280,11040,1390,66,1, 5040,199920,413560,206920,37450,2842,91,1,40320, 2204160,5989760,3931200,955920,102816,5208,120,1] |