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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 0 |
| 2 | 0 |
| 3 | 0 |
| 4 | 1 |
| 5 | -2 |
| 6 | 0 |
| 7 | 0 |
| 8 | 2 |
| 9 | -2 |
| 10 | 1 |
| 11 | 0 |
| 12 | 3 |
| 13 | -4 |
| 14 | 1 |
| 15 | -2 |
| 16 | 5 |
| 17 | -6 |
| 18 | 2 |
| 19 | -2 |
| 20 | 10 |
| 21 | -10 |
| 22 | 3 |
| 23 | -4 |
| 24 | 14 |
| 25 | -16 |
| 26 | 5 |
| 27 | -6 |
| 28 | 21 |
| 29 | -24 |
| 30 | 11 |
| 31 | -10 |
| 32 | 31 |
| 33 | -34 |
| 34 | 15 |
| 35 | -18 |
| 36 | 45 |
| 37 | -50 |
| 38 | 23 |
| 39 | -26 |
| 40 | 67 |
| 41 | -70 |
| 42 | 34 |
| 43 | -38 |
| 44 | 93 |
| 45 | -104 |
| 46 | 50 |
| 47 | -56 |
| 48 | 130 |
| 49 | -140 |
| 50 | 77 |
| 51 | -80 |
| 52 | 179 |
| 53 | -196 |
| 54 | 107 |
| 55 | -120 |
| 56 | 245 |
| 57 | -264 |
| 58 | 151 |
| 59 | -164 |
| 60 | 338 |
| 61 | -360 |
| 62 | 210 |
| 63 | -230 |
| 64 | 451 |
| 65 | -488 |
| 66 | 290 |
| 67 | -314 |
| 68 | 604 |
| 69 | -650 |
| 70 | 404 |
[1,0,0,0,1,-2,0,0,2,-2,1,0,3,-4,1,-2,5,-6,2,-2,10, -10,3,-4,14,-16,5,-6,21,-24,11,-10,31,-34,15,-18, 45,-50,23,-26,67,-70,34,-38,93,-104,50,-56,130, -140,77,-80,179,-196,107,-120,245,-264,151,-164, 338,-360,210,-230,451,-488,290,-314,604,-650,404] |