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 | 1 |
| 2 | 1 |
| 3 | 1 |
| 4 | -3 |
| 5 | 1 |
| 6 | 1 |
| 7 | 6 |
| 8 | 6 |
| 9 | 1 |
| 10 | 1 |
| 11 | -15 |
| 12 | 30 |
| 13 | -15 |
| 14 | 1 |
| 15 | 1 |
| 16 | 120 |
| 17 | 600 |
| 18 | 600 |
| 19 | 120 |
| 20 | 1 |
| 21 | 1 |
| 22 | -63 |
| 23 | 2520 |
| 24 | -6300 |
| 25 | 2520 |
| 26 | -63 |
| 27 | 1 |
| 28 | 1 |
| 29 | 5040 |
| 30 | 105840 |
| 31 | 2116800 |
| 32 | 2116800 |
| 33 | 105840 |
| 34 | 5040 |
| 35 | 1 |
| 36 | 1 |
| 37 | -255 |
| 38 | 428400 |
| 39 | -4498200 |
| 40 | 35985600 |
| 41 | -4498200 |
| 42 | 428400 |
| 43 | -255 |
| 44 | 1 |
| 45 | 1 |
| 46 | 362880 |
| 47 | 30844800 |
| 48 | 25909632000 |
| 49 | 108820454400 |
| 50 | 108820454400 |
| 51 | 25909632000 |
| 52 | 30844800 |
| 53 | 362880 |
| 54 | 1 |
[1,1,1,1,-3,1,1,6,6,1,1,-15,30,-15,1,1,120,600, 600,120,1,1,-63,2520,-6300,2520,-63,1,1,5040, 105840,2116800,2116800,105840,5040,1,1,-255, 428400,-4498200,35985600,-4498200,428400,-255,1,1, 362880,30844800,25909632000,108820454400, 108820454400,25909632000,30844800,362880,1] |