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Reminder: The OEIS is hiring a new managing editor, and the application deadline is January 26.
| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | -1 |
| 2 | 1 |
| 3 | -1 |
| 4 | -3 |
| 5 | 19 |
| 6 | -65 |
| 7 | 181 |
| 8 | -419 |
| 9 | 755 |
| 10 | -749 |
| 11 | -1530 |
| 12 | 12255 |
| 13 | -47477 |
| 14 | 141065 |
| 15 | -343526 |
| 16 | 660941 |
| 17 | -770917 |
| 18 | -911369 |
| 19 | 9721976 |
| 20 | -40135713 |
| 21 | 124134772 |
| 22 | -313463842 |
| 23 | 631382751 |
| 24 | -824406065 |
| 25 | -492101356 |
| 26 | 8192253811 |
| 27 | -35948431288 |
| 28 | 115087580857 |
| 29 | -299576625051 |
| 30 | 627027769120 |
| 31 | -894734468883 |
[1,-1,1,-1,-3,19,-65,181,-419,755,-749,-1530, 12255,-47477,141065,-343526,660941,-770917, -911369,9721976,-40135713,124134772,-313463842, 631382751,-824406065,-492101356,8192253811, -35948431288,115087580857,-299576625051, 627027769120,-894734468883] |