The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 1 | 2 |
| 2 | 0 |
| 3 | 0 |
| 4 | 4 |
| 5 | 0 |
| 6 | 24 |
| 7 | 0 |
| 8 | 8 |
| 9 | 36 |
| 10 | 120 |
| 11 | 0 |
| 12 | 24 |
| 13 | 0 |
| 14 | 840 |
| 15 | 360 |
| 16 | 16 |
| 17 | 0 |
| 18 | 72 |
| 19 | 0 |
| 20 | 120 |
| 21 | 2520 |
| 22 | 9240 |
| 23 | 0 |
| 24 | 48 |
| 25 | 900 |
| 26 | 120120 |
| 27 | 216 |
| 28 | 840 |
| 29 | 0 |
| 30 | 0 |
| 31 | 0 |
| 32 | 32 |
| 33 | 27720 |
| 34 | 2042040 |
| 35 | 12600 |
| 36 | 144 |
| 37 | 0 |
| 38 | 38798760 |
| 39 | 360360 |
| 40 | 240 |
| 41 | 0 |
| 42 | 0 |
| 43 | 0 |
| 44 | 9240 |
| 45 | 1080 |
| 46 | 892371480 |
| 47 | 0 |
| 48 | 96 |
| 49 | 44100 |
| 50 | 1800 |
| 51 | 6126120 |
| 52 | 120120 |
| 53 | 0 |
| 54 | 432 |
| 55 | 138600 |
| 56 | 1680 |
| 57 | 116396280 |
| 58 | 25878772920 |
| 59 | 0 |
| 60 | 720 |
| 61 | 0 |
| 62 | 802241960520 |
[2,0,0,4,0,24,0,8,36,120,0,24,0,840,360,16,0,72,0, 120,2520,9240,0,48,900,120120,216,840,0,0,0,32, 27720,2042040,12600,144,0,38798760,360360,240,0,0, 0,9240,1080,892371480,0,96,44100,1800,6126120, 120120,0,432,138600,1680,116396280,25878772920,0, 720,0,802241960520] |