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| n | a(n) |
|---|---|
| -1 | 1 |
| 0 | 0 |
| 1 | -6 |
| 2 | 20 |
| 3 | 15 |
| 4 | 36 |
| 5 | 0 |
| 6 | -84 |
| 7 | 195 |
| 8 | 100 |
| 9 | 240 |
| 10 | 0 |
| 11 | -461 |
| 12 | 1020 |
| 13 | 540 |
| 14 | 1144 |
| 15 | 0 |
| 16 | -1980 |
| 17 | 4170 |
| 18 | 2040 |
| 19 | 4275 |
| 20 | 0 |
| 21 | -6984 |
| 22 | 14340 |
| 23 | 6940 |
| 24 | 14076 |
| 25 | 0 |
| 26 | -21936 |
| 27 | 44025 |
| 28 | 20760 |
| 29 | 41476 |
| 30 | 0 |
| 31 | -62484 |
| 32 | 123620 |
| 33 | 57630 |
| 34 | 113244 |
| 35 | 0 |
| 36 | -166056 |
| 37 | 324120 |
| 38 | 148900 |
| 39 | 289578 |
| 40 | 0 |
[1,0,-6,20,15,36,0,-84,195,100,240,0,-461,1020, 540,1144,0,-1980,4170,2040,4275,0,-6984,14340, 6940,14076,0,-21936,44025,20760,41476,0,-62484, 123620,57630,113244,0,-166056,324120,148900, 289578,0] |