The OEIS is supported by the many generous donors to the OEIS Foundation.
Reminder: The OEIS is hiring a new managing editor, and the application deadline is January 26.
Reminder: The OEIS is hiring a new managing editor, and the application deadline is January 26.
| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 0 |
| 2 | 2 |
| 3 | 2 |
| 4 | 0 |
| 5 | 6 |
| 6 | 0 |
| 7 | 16 |
| 8 | 0 |
| 9 | 24 |
| 10 | 16 |
| 11 | 0 |
| 12 | 120 |
| 13 | 0 |
| 14 | 120 |
| 15 | 0 |
| 16 | 272 |
| 17 | 0 |
| 18 | 960 |
| 19 | 0 |
| 20 | 720 |
| 21 | 272 |
| 22 | 0 |
| 23 | 3696 |
| 24 | 0 |
| 25 | 8400 |
| 26 | 0 |
| 27 | 5040 |
| 28 | 0 |
| 29 | 7936 |
| 30 | 0 |
| 31 | 48384 |
| 32 | 0 |
| 33 | 80640 |
| 34 | 0 |
| 35 | 40320 |
| 36 | 7936 |
| 37 | 0 |
| 38 | 168960 |
| 39 | 0 |
| 40 | 645120 |
| 41 | 0 |
| 42 | 846720 |
| 43 | 0 |
| 44 | 362880 |
| 45 | 0 |
| 46 | 353792 |
| 47 | 0 |
| 48 | 3256320 |
| 49 | 0 |
| 50 | 8951040 |
| 51 | 0 |
| 52 | 9676800 |
| 53 | 0 |
| 54 | 3628800 |
[1,0,2,2,0,6,0,16,0,24,16,0,120,0,120,0,272,0,960, 0,720,272,0,3696,0,8400,0,5040,0,7936,0,48384,0, 80640,0,40320,7936,0,168960,0,645120,0,846720,0, 362880,0,353792,0,3256320,0,8951040,0,9676800,0, 3628800] |