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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | -2 |
| 3 | 1 |
| 4 | -4 |
| 5 | 3 |
| 6 | 1 |
| 7 | -6 |
| 8 | 10 |
| 9 | -4 |
| 10 | 1 |
| 11 | -8 |
| 12 | 21 |
| 13 | -20 |
| 14 | 5 |
| 15 | 1 |
| 16 | -10 |
| 17 | 36 |
| 18 | -56 |
| 19 | 35 |
| 20 | -6 |
| 21 | 1 |
| 22 | -12 |
| 23 | 55 |
| 24 | -120 |
| 25 | 126 |
| 26 | -56 |
| 27 | 7 |
| 28 | 1 |
| 29 | -14 |
| 30 | 78 |
| 31 | -220 |
| 32 | 330 |
| 33 | -252 |
| 34 | 84 |
| 35 | -8 |
| 36 | 1 |
| 37 | -16 |
| 38 | 105 |
| 39 | -364 |
| 40 | 715 |
| 41 | -792 |
| 42 | 462 |
| 43 | -120 |
| 44 | 9 |
| 45 | 1 |
| 46 | -18 |
| 47 | 136 |
| 48 | -560 |
| 49 | 1365 |
| 50 | -2002 |
| 51 | 1716 |
| 52 | -792 |
| 53 | 165 |
| 54 | -10 |
| 55 | 1 |
| 56 | -20 |
| 57 | 171 |
| 58 | -816 |
| 59 | 2380 |
| 60 | -4368 |
| 61 | 5005 |
| 62 | -3432 |
| 63 | 1287 |
| 64 | -220 |
| 65 | 11 |
| 66 | 1 |
[1,1,-2,1,-4,3,1,-6,10,-4,1,-8,21,-20,5,1,-10,36, -56,35,-6,1,-12,55,-120,126,-56,7,1,-14,78,-220, 330,-252,84,-8,1,-16,105,-364,715,-792,462,-120,9, 1,-18,136,-560,1365,-2002,1716,-792,165,-10,1,-20, 171,-816,2380,-4368,5005,-3432,1287,-220,11,1] |