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| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | -2 |
| 3 | 1 |
| 4 | -7 |
| 5 | 3 |
| 6 | -21 |
| 7 | 7 |
| 8 | -49 |
| 9 | 23 |
| 10 | -97 |
| 11 | 57 |
| 12 | -195 |
| 13 | 117 |
| 14 | -359 |
| 15 | 256 |
| 16 | -624 |
| 17 | 498 |
| 18 | -1086 |
| 19 | 909 |
| 20 | -1831 |
| 21 | 1634 |
| 22 | -2986 |
| 23 | 2833 |
| 24 | -4847 |
| 25 | 4728 |
| 26 | -7700 |
| 27 | 7798 |
| 28 | -12026 |
| 29 | 12537 |
| 30 | -18633 |
| 31 | 19745 |
| 32 | -28479 |
| 33 | 30723 |
| 34 | -42955 |
| 35 | 47100 |
| 36 | -64284 |
| 37 | 71136 |
| 38 | -95228 |
| 39 | 106402 |
| 40 | -139718 |
| 41 | 157327 |
| 42 | -203495 |
[0,-2,1,-7,3,-21,7,-49,23,-97,57,-195,117,-359, 256,-624,498,-1086,909,-1831,1634,-2986,2833, -4847,4728,-7700,7798,-12026,12537,-18633,19745, -28479,30723,-42955,47100,-64284,71136,-95228, 106402,-139718,157327,-203495] |