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| n | a(n) |
|---|---|
| -1 | 1 |
| 0 | -2 |
| 1 | 0 |
| 2 | 0 |
| 3 | 8 |
| 4 | -12 |
| 5 | 0 |
| 6 | 0 |
| 7 | 39 |
| 8 | -56 |
| 9 | 0 |
| 10 | 0 |
| 11 | 152 |
| 12 | -208 |
| 13 | 0 |
| 14 | 0 |
| 15 | 513 |
| 16 | -684 |
| 17 | 0 |
| 18 | 0 |
| 19 | 1560 |
| 20 | -2032 |
| 21 | 0 |
| 22 | 0 |
| 23 | 4382 |
| 24 | -5616 |
| 25 | 0 |
| 26 | 0 |
| 27 | 11552 |
| 28 | -14592 |
| 29 | 0 |
| 30 | 0 |
| 31 | 28899 |
| 32 | -36088 |
| 33 | 0 |
| 34 | 0 |
| 35 | 69168 |
| 36 | -85500 |
| 37 | 0 |
| 38 | 0 |
| 39 | 159372 |
| 40 | -195312 |
| 41 | 0 |
| 42 | 0 |
| 43 | 355224 |
| 44 | -431984 |
| 45 | 0 |
| 46 | 0 |
| 47 | 768885 |
| 48 | -928720 |
| 49 | 0 |
| 50 | 0 |
| 51 | 1621296 |
| 52 | -1946352 |
| 53 | 0 |
| 54 | 0 |
| 55 | 3339201 |
[1,-2,0,0,8,-12,0,0,39,-56,0,0,152,-208,0,0,513, -684,0,0,1560,-2032,0,0,4382,-5616,0,0,11552, -14592,0,0,28899,-36088,0,0,69168,-85500,0,0, 159372,-195312,0,0,355224,-431984,0,0,768885, -928720,0,0,1621296,-1946352,0,0,3339201] |