| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | -1 |
| 3 | 1 |
| 4 | 2 |
| 5 | 2 |
| 6 | 1 |
| 7 | -1 |
| 8 | 0 |
| 9 | 16 |
| 10 | -3 |
| 11 | -87 |
| 12 | -242 |
| 13 | 678 |
| 14 | -439 |
| 15 | -3620 |
| 16 | -3961 |
| 17 | 4334 |
| 18 | -95 |
| 19 | 95 |
| 20 | 4524 |
| 21 | 54001 |
| 22 | 64350 |
| 23 | -87309 |
| 24 | -937766 |
| 25 | 17314434 |
| 26 | -542208643 |
| 27 | 3200800363 |
| 28 | 3953925422 |
| 29 | -4558246642 |
| 30 | -15110328113 |
[0,-1,1,2,2,1,-1,0,16,-3,-87,-242,678,-439,-3620, -3961,4334,-95,95,4524,54001,64350,-87309,-937766, 17314434,-542208643,3200800363,3953925422, -4558246642,-15110328113] |