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 | 2 |
| 3 | 0 |
| 4 | 1 |
| 5 | 6 |
| 6 | 0 |
| 7 | 9 |
| 8 | 24 |
| 9 | 0 |
| 10 | 72 |
| 11 | 0 |
| 12 | 9 |
| 13 | 120 |
| 14 | 0 |
| 15 | 600 |
| 16 | 0 |
| 17 | 225 |
| 18 | 720 |
| 19 | 0 |
| 20 | 5400 |
| 21 | 0 |
| 22 | 4050 |
| 23 | 0 |
| 24 | 225 |
| 25 | 5040 |
| 26 | 0 |
| 27 | 52920 |
| 28 | 0 |
| 29 | 66150 |
| 30 | 0 |
| 31 | 11025 |
| 32 | 40320 |
| 33 | 0 |
| 34 | 564480 |
| 35 | 0 |
| 36 | 1058400 |
| 37 | 0 |
| 38 | 352800 |
| 39 | 0 |
| 40 | 11025 |
| 41 | 362880 |
| 42 | 0 |
| 43 | 6531840 |
| 44 | 0 |
| 45 | 17146080 |
| 46 | 0 |
| 47 | 9525600 |
| 48 | 0 |
| 49 | 893025 |
| 50 | 3628800 |
| 51 | 0 |
| 52 | 81648000 |
| 53 | 0 |
[1,1,2,0,1,6,0,9,24,0,72,0,9,120,0,600,0,225,720, 0,5400,0,4050,0,225,5040,0,52920,0,66150,0,11025, 40320,0,564480,0,1058400,0,352800,0,11025,362880, 0,6531840,0,17146080,0,9525600,0,893025,3628800,0, 81648000,0] |