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 | 0 |
| 5 | 2 |
| 6 | 1 |
| 7 | 0 |
| 8 | 2 |
| 9 | 6 |
| 10 | 1 |
| 11 | 0 |
| 12 | 0 |
| 13 | 3 |
| 14 | 24 |
| 15 | 1 |
| 16 | 0 |
| 17 | 0 |
| 18 | 6 |
| 19 | 28 |
| 20 | 120 |
| 21 | 1 |
| 22 | 0 |
| 23 | 0 |
| 24 | 0 |
| 25 | 24 |
| 26 | 125 |
| 27 | 720 |
| 28 | 1 |
| 29 | 0 |
| 30 | 0 |
| 31 | 0 |
| 32 | 24 |
| 33 | 70 |
| 34 | 1146 |
| 35 | 5040 |
| 36 | 1 |
| 37 | 0 |
| 38 | 0 |
| 39 | 0 |
| 40 | 0 |
| 41 | 180 |
| 42 | 900 |
| 43 | 8827 |
| 44 | 40320 |
| 45 | 1 |
| 46 | 0 |
| 47 | 0 |
| 48 | 0 |
| 49 | 0 |
| 50 | 120 |
| 51 | 900 |
| 52 | 10514 |
| 53 | 94200 |
| 54 | 362880 |
| 55 | 1 |
| 56 | 0 |
| 57 | 0 |
| 58 | 0 |
| 59 | 0 |
| 60 | 0 |
| 61 | 1440 |
| 62 | 3780 |
| 63 | 88368 |
| 64 | 1007001 |
| 65 | 3628800 |
[1,1,1,1,0,2,1,0,2,6,1,0,0,3,24,1,0,0,6,28,120,1, 0,0,0,24,125,720,1,0,0,0,24,70,1146,5040,1,0,0,0, 0,180,900,8827,40320,1,0,0,0,0,120,900,10514, 94200,362880,1,0,0,0,0,0,1440,3780,88368,1007001, 3628800] |