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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | -3 |
| 2 | 6 |
| 3 | -12 |
| 4 | 21 |
| 5 | -36 |
| 6 | 60 |
| 7 | -96 |
| 8 | 150 |
| 9 | -228 |
| 10 | 342 |
| 11 | -504 |
| 12 | 732 |
| 13 | -1050 |
| 14 | 1488 |
| 15 | -2088 |
| 16 | 2901 |
| 17 | -3996 |
| 18 | 5460 |
| 19 | -7404 |
| 20 | 9972 |
| 21 | -13344 |
| 22 | 17748 |
| 23 | -23472 |
| 24 | 30876 |
| 25 | -40413 |
| 26 | 52644 |
| 27 | -68268 |
| 28 | 88152 |
| 29 | -113364 |
| 30 | 145224 |
| 31 | -185352 |
| 32 | 235734 |
| 33 | -298800 |
| 34 | 377514 |
| 35 | -475488 |
| 36 | 597108 |
| 37 | -747690 |
| 38 | 933672 |
[1,-3,6,-12,21,-36,60,-96,150,-228,342,-504,732, -1050,1488,-2088,2901,-3996,5460,-7404,9972, -13344,17748,-23472,30876,-40413,52644,-68268, 88152,-113364,145224,-185352,235734,-298800, 377514,-475488,597108,-747690,933672] |