The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 2 |
| 3 | 1 |
| 4 | 6 |
| 5 | 2 |
| 6 | 2 |
| 7 | 24 |
| 8 | 9 |
| 9 | 6 |
| 10 | 6 |
| 11 | 120 |
| 12 | 44 |
| 13 | 24 |
| 14 | 24 |
| 15 | 24 |
| 16 | 720 |
| 17 | 265 |
| 18 | 160 |
| 19 | 120 |
| 20 | 120 |
| 21 | 120 |
| 22 | 5040 |
| 23 | 1854 |
| 24 | 1140 |
| 25 | 720 |
| 26 | 720 |
| 27 | 720 |
| 28 | 720 |
| 29 | 40320 |
| 30 | 14833 |
| 31 | 8988 |
| 32 | 6300 |
| 33 | 5040 |
| 34 | 5040 |
| 35 | 5040 |
| 36 | 5040 |
| 37 | 362880 |
| 38 | 133496 |
| 39 | 80864 |
| 40 | 58464 |
| 41 | 40320 |
| 42 | 40320 |
| 43 | 40320 |
| 44 | 40320 |
| 45 | 40320 |
[1,2,1,6,2,2,24,9,6,6,120,44,24,24,24,720,265,160, 120,120,120,5040,1854,1140,720,720,720,720,40320, 14833,8988,6300,5040,5040,5040,5040,362880,133496, 80864,58464,40320,40320,40320,40320,40320] |