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 | 2 |
| 2 | 2 |
| 3 | 1 |
| 4 | -1 |
| 5 | 24 |
| 6 | 24 |
| 7 | 24 |
| 8 | 24 |
| 9 | 12 |
| 10 | -12 |
| 11 | 12 |
| 12 | -12 |
| 13 | 4 |
| 14 | -4 |
| 15 | -4 |
| 16 | 4 |
| 17 | 1 |
| 18 | 1 |
| 19 | -1 |
| 20 | -1 |
| 21 | 40320 |
| 22 | 40320 |
| 23 | 40320 |
| 24 | 40320 |
| 25 | 40320 |
| 26 | 40320 |
| 27 | 40320 |
| 28 | 40320 |
| 29 | 20160 |
| 30 | -20160 |
| 31 | -20160 |
| 32 | -20160 |
| 33 | 20160 |
| 34 | 20160 |
| 35 | -20160 |
| 36 | 20160 |
| 37 | 6720 |
| 38 | 6720 |
| 39 | -6720 |
| 40 | -6720 |
| 41 | -6720 |
| 42 | -6720 |
| 43 | 6720 |
| 44 | 6720 |
| 45 | 1680 |
[1,2,2,1,-1,24,24,24,24,12,-12,12,-12,4,-4,-4,4,1, 1,-1,-1,40320,40320,40320,40320,40320,40320,40320, 40320,20160,-20160,-20160,-20160,20160,20160, -20160,20160,6720,6720,-6720,-6720,-6720,-6720, 6720,6720,1680] |