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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 2 |
| 2 | 2 |
| 3 | 2 |
| 4 | 0 |
| 5 | 2 |
| 6 | -2 |
| 7 | 2 |
| 8 | 0 |
| 9 | -4 |
| 10 | 8 |
| 11 | -4 |
| 12 | -26 |
| 13 | 112 |
| 14 | -288 |
| 15 | 560 |
| 16 | -832 |
| 17 | 782 |
| 18 | 274 |
| 19 | -3378 |
| 20 | 9424 |
| 21 | -17498 |
| 22 | 21182 |
| 23 | -2154 |
| 24 | -78180 |
| 25 | 284594 |
| 26 | -700018 |
| 27 | 1381802 |
| 28 | -2250316 |
| 29 | 2877674 |
| 30 | -2172870 |
| 31 | -1955998 |
| 32 | 12715122 |
| 33 | -33812990 |
| 34 | 67322842 |
| 35 | -108956110 |
| 36 | 139447006 |
| 37 | -110023870 |
| 38 | -83188990 |
| 39 | 651268018 |
[1,2,2,2,0,2,-2,2,0,-4,8,-4,-26,112,-288,560,-832, 782,274,-3378,9424,-17498,21182,-2154,-78180, 284594,-700018,1381802,-2250316,2877674,-2172870, -1955998,12715122,-33812990,67322842,-108956110, 139447006,-110023870,-83188990,651268018] |