The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | -2 |
| 3 | -4 |
| 4 | 0 |
| 5 | -3 |
| 6 | 0 |
| 7 | -18 |
| 8 | 0 |
| 9 | 0 |
| 10 | 0 |
| 11 | -39 |
| 12 | 0 |
| 13 | 0 |
| 14 | 0 |
| 15 | 0 |
| 16 | 0 |
| 17 | -492 |
| 18 | 0 |
| 19 | 33 |
| 20 | 0 |
| 21 | 0 |
| 22 | 0 |
| 23 | -970 |
| 24 | 0 |
| 25 | 0 |
| 26 | 0 |
| 27 | 0 |
| 28 | 0 |
| 29 | -82656 |
| 30 | 0 |
| 31 | -69356 |
| 32 | 0 |
| 33 | 0 |
| 34 | 0 |
| 35 | 0 |
| 36 | 0 |
| 37 | -579348 |
| 38 | 0 |
| 39 | 0 |
| 40 | 0 |
| 41 | 2827344 |
| 42 | 0 |
| 43 | -91107954 |
| 44 | 0 |
| 45 | 0 |
| 46 | 0 |
| 47 | 878803380 |
| 48 | 0 |
| 49 | 0 |
| 50 | 0 |
| 51 | 0 |
| 52 | 0 |
| 53 | 35325442994 |
| 54 | 0 |
| 55 | 0 |
| 56 | 0 |
| 57 | 0 |
| 58 | 0 |
| 59 | 96619803968 |
| 60 | 0 |
| 61 | -241455491727552 |
| 62 | 0 |
| 63 | 0 |
| 64 | 0 |
| 65 | 0 |
| 66 | 0 |
| 67 | 360242354363960 |
| 68 | 0 |
| 69 | 0 |
| 70 | 0 |
[0,-2,-4,0,-3,0,-18,0,0,0,-39,0,0,0,0,0,-492,0,33, 0,0,0,-970,0,0,0,0,0,-82656,0,-69356,0,0,0,0,0, -579348,0,0,0,2827344,0,-91107954,0,0,0,878803380, 0,0,0,0,0,35325442994,0,0,0,0,0,96619803968,0, -241455491727552,0,0,0,0,0,360242354363960,0,0,0] |