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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | -3 |
| 2 | 6 |
| 3 | -15 |
| 4 | 36 |
| 5 | 0 |
| 6 | 210 |
| 7 | -1014 |
| 8 | 1224 |
| 9 | -2955 |
| 10 | 0 |
| 11 | 0 |
| 12 | 41580 |
| 13 | -200766 |
| 14 | 484692 |
| 15 | 0 |
| 16 | 1412496 |
| 17 | 0 |
| 18 | 8232630 |
| 19 | -39750654 |
| 20 | 0 |
| 21 | -231683790 |
| 22 | 0 |
| 23 | 0 |
| 24 | 1630019160 |
| 25 | -3935214363 |
| 26 | 19000895772 |
| 27 | -22936110135 |
| 28 | 110745336312 |
| 29 | 0 |
| 30 | 0 |
| 31 | -1558305137094 |
| 32 | 1881040698144 |
| 33 | 0 |
| 34 | 0 |
| 35 | 0 |
| 36 | 63900011068740 |
[1,-3,6,-15,36,0,210,-1014,1224,-2955,0,0,41580, -200766,484692,0,1412496,0,8232630,-39750654,0, -231683790,0,0,1630019160,-3935214363,19000895772, -22936110135,110745336312,0,0,-1558305137094, 1881040698144,0,0,0,63900011068740] |