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 | 1 |
| 8 | 6 |
| 9 | 6 |
| 10 | 0 |
| 11 | 1 |
| 12 | 50 |
| 13 | 36 |
| 14 | 24 |
| 15 | 0 |
| 16 | 1 |
| 17 | 510 |
| 18 | 510 |
| 19 | 240 |
| 20 | 120 |
| 21 | 0 |
| 22 | 1 |
| 23 | 7682 |
| 24 | 10620 |
| 25 | 4800 |
| 26 | 1800 |
| 27 | 720 |
| 28 | 0 |
| 29 | 1 |
| 30 | 161406 |
| 31 | 312606 |
| 32 | 136920 |
| 33 | 47040 |
| 34 | 15120 |
| 35 | 5040 |
| 36 | 0 |
| 37 | 1 |
| 38 | 4747010 |
| 39 | 13439076 |
| 40 | 5630184 |
| 41 | 1678320 |
| 42 | 493920 |
| 43 | 141120 |
| 44 | 40320 |
| 45 | 0 |
| 46 | 1 |
| 47 | 194342910 |
| 48 | 821218110 |
| 49 | 319384800 |
| 50 | 83963880 |
| 51 | 21137760 |
| 52 | 5594400 |
| 53 | 1451520 |
| 54 | 362880 |
[1,0,1,0,1,2,0,1,6,6,0,1,50,36,24,0,1,510,510,240, 120,0,1,7682,10620,4800,1800,720,0,1,161406, 312606,136920,47040,15120,5040,0,1,4747010, 13439076,5630184,1678320,493920,141120,40320,0,1, 194342910,821218110,319384800,83963880,21137760, 5594400,1451520,362880] |