The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 0 |
| 2 | 1 |
| 3 | 4 |
| 4 | 0 |
| 5 | 0 |
| 6 | 1 |
| 7 | -80 |
| 8 | 0 |
| 9 | 0 |
| 10 | 20 |
| 11 | 1 |
| 12 | 0 |
| 13 | 11200 |
| 14 | 0 |
| 15 | 0 |
| 16 | 0 |
| 17 | 0 |
| 18 | 60 |
| 19 | 0 |
| 20 | 0 |
| 21 | 1 |
| 22 | -6272000 |
| 23 | 0 |
| 24 | 0 |
| 25 | -3136000 |
| 26 | 0 |
| 27 | 0 |
| 28 | 78400 |
| 29 | 0 |
| 30 | 0 |
| 31 | 2800 |
| 32 | 0 |
| 33 | 0 |
| 34 | 140 |
| 35 | 0 |
| 36 | 0 |
| 37 | 1 |
| 38 | -38635520000 |
| 39 | 0 |
| 40 | 0 |
| 41 | 19317760000 |
| 42 | 0 |
| 43 | 0 |
| 44 | 1448832000 |
| 45 | 0 |
| 46 | 0 |
| 47 | -17248000 |
| 48 | 0 |
| 49 | 0 |
| 50 | 627200 |
| 51 | 0 |
| 52 | 0 |
| 53 | 18480 |
| 54 | 0 |
| 55 | 0 |
| 56 | 280 |
| 57 | 0 |
| 58 | 0 |
| 59 | 1 |
[1,0,1,4,0,0,1,-80,0,0,20,1,0,11200,0,0,0,0,60,0, 0,1,-6272000,0,0,-3136000,0,0,78400,0,0,2800,0,0, 140,0,0,1,-38635520000,0,0,19317760000,0,0, 1448832000,0,0,-17248000,0,0,627200,0,0,18480,0,0, 280,0,0,1] |