The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | -1 |
| 2 | -2 |
| 3 | -1 |
| 4 | -3 |
| 5 | 7 |
| 6 | -12 |
| 7 | 32 |
| 8 | -10 |
| 9 | -15 |
| 10 | 77 |
| 11 | 187 |
| 12 | -760 |
| 13 | 846 |
| 14 | 1382 |
| 15 | -4197 |
| 16 | 1371 |
| 17 | 6650 |
| 18 | -9991 |
| 19 | 19220 |
| 20 | -32439 |
| 21 | -80889 |
| 22 | 290596 |
| 23 | 127853 |
| 24 | -1372003 |
| 25 | 913414 |
| 26 | 3253746 |
| 27 | -6728692 |
| 28 | 2302327 |
| 29 | 14461937 |
| 30 | -46087740 |
| 31 | 66588519 |
| 32 | 15702643 |
| 33 | -357119564 |
| 34 | 752905288 |
| 35 | 310992687 |
[1,-1,-2,-1,-3,7,-12,32,-10,-15,77,187,-760,846, 1382,-4197,1371,6650,-9991,19220,-32439,-80889, 290596,127853,-1372003,913414,3253746,-6728692, 2302327,14461937,-46087740,66588519,15702643, -357119564,752905288,310992687] |