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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 1 |
| 3 | 0 |
| 4 | -2 |
| 5 | -5 |
| 6 | 29 |
| 7 | 88 |
| 8 | 97 |
| 9 | -79 |
| 10 | -1828 |
| 11 | -2318 |
| 12 | -1476 |
| 13 | -5773 |
| 14 | -19200 |
| 15 | 73218 |
| 16 | 327052 |
| 17 | -598255 |
| 18 | -3501366 |
| 19 | 23884333 |
| 20 | -4891825 |
| 21 | -86432204 |
| 22 | -127132665 |
| 23 | 1033299853 |
| 24 | -1658989719 |
| 25 | -1834784714 |
| 26 | -17149335456 |
| 27 | -17535487934 |
| 28 | -174760519827 |
[1,1,0,-2,-5,29,88,97,-79,-1828,-2318,-1476,-5773, -19200,73218,327052,-598255,-3501366,23884333, -4891825,-86432204,-127132665,1033299853, -1658989719,-1834784714,-17149335456,-17535487934, -174760519827] |