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 | 1 |
| 3 | 0 |
| 4 | 1 |
| 5 | 2 |
| 6 | 0 |
| 7 | 2 |
| 8 | 5 |
| 9 | 6 |
| 10 | 0 |
| 11 | 2 |
| 12 | 16 |
| 13 | 18 |
| 14 | 24 |
| 15 | 0 |
| 16 | 3 |
| 17 | 39 |
| 18 | 80 |
| 19 | 84 |
| 20 | 120 |
| 21 | 0 |
| 22 | 4 |
| 23 | 106 |
| 24 | 323 |
| 25 | 432 |
| 26 | 480 |
| 27 | 720 |
| 28 | 0 |
| 29 | 5 |
| 30 | 245 |
| 31 | 1106 |
| 32 | 2052 |
| 33 | 2820 |
| 34 | 3240 |
| 35 | 5040 |
| 36 | 0 |
| 37 | 6 |
| 38 | 621 |
| 39 | 3822 |
| 40 | 10576 |
| 41 | 14820 |
| 42 | 21480 |
| 43 | 25200 |
| 44 | 40320 |
| 45 | 0 |
| 46 | 8 |
| 47 | 1431 |
| 48 | 13840 |
| 49 | 41896 |
| 50 | 86724 |
| 51 | 124440 |
| 52 | 186480 |
| 53 | 221760 |
| 54 | 362880 |
[1,0,1,0,1,2,0,2,5,6,0,2,16,18,24,0,3,39,80,84, 120,0,4,106,323,432,480,720,0,5,245,1106,2052, 2820,3240,5040,0,6,621,3822,10576,14820,21480, 25200,40320,0,8,1431,13840,41896,86724,124440, 186480,221760,362880] |