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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 3 |
| 2 | 0 |
| 3 | -3 |
| 4 | 6 |
| 5 | 0 |
| 6 | -12 |
| 7 | 15 |
| 8 | 0 |
| 9 | -30 |
| 10 | 36 |
| 11 | 0 |
| 12 | -60 |
| 13 | 78 |
| 14 | 0 |
| 15 | -117 |
| 16 | 150 |
| 17 | 0 |
| 18 | -228 |
| 19 | 276 |
| 20 | 0 |
| 21 | -420 |
| 22 | 504 |
| 23 | 0 |
| 24 | -732 |
| 25 | 885 |
| 26 | 0 |
| 27 | -1245 |
| 28 | 1488 |
| 29 | 0 |
| 30 | -2088 |
| 31 | 2454 |
| 32 | 0 |
| 33 | -3420 |
| 34 | 3996 |
| 35 | 0 |
| 36 | -5460 |
| 37 | 6378 |
| 38 | 0 |
| 39 | -8583 |
| 40 | 9972 |
| 41 | 0 |
| 42 | -13344 |
| 43 | 15378 |
| 44 | 0 |
| 45 | -20448 |
| 46 | 23472 |
| 47 | 0 |
| 48 | -30876 |
| 49 | 35379 |
| 50 | 0 |
| 51 | -46116 |
| 52 | 52644 |
[1,3,0,-3,6,0,-12,15,0,-30,36,0,-60,78,0,-117,150, 0,-228,276,0,-420,504,0,-732,885,0,-1245,1488,0, -2088,2454,0,-3420,3996,0,-5460,6378,0,-8583,9972, 0,-13344,15378,0,-20448,23472,0,-30876,35379,0, -46116,52644] |