Reminder: The OEIS is hiring a new managing editor, and the application deadline is January 26.
n | a(n) |
---|---|
0 | 1 |
1 | 0 |
2 | -1 |
3 | 0 |
4 | 1 |
5 | -4 |
6 | 12 |
7 | 64 |
8 | -172 |
9 | -1348 |
10 | 3456 |
11 | 34240 |
12 | -87084 |
13 | 370640 |
14 | -872336 |
15 | -22639616 |
16 | 52307088 |
17 | -181323568 |
18 | 399580288 |
19 | 23627011200 |
20 | -51305628400 |
21 | -686160247552 |
22 | 1545932859328 |
23 | 68098264912128 |
24 | -155370174372864 |
25 | 6326621032802304 |
26 | -13829529077133312 |
27 | -1087288396552040448 |
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