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 | 3 |
4 | -13 |
5 | 65 |
6 | -353 |
7 | 2025 |
8 | -12077 |
9 | 74143 |
10 | -465481 |
11 | 2974863 |
12 | -19289821 |
13 | 126594191 |
14 | -839273105 |
15 | 5612483619 |
16 | -37814455781 |
17 | 256447068841 |
18 | -1749182184793 |
19 | 11991887667273 |
20 | -82588248514885 |
21 | 571118483653841 |
[1,1,-1,3,-13,65,-353,2025,-12077,74143,-465481, 2974863,-19289821,126594191,-839273105,5612483619, -37814455781,256447068841,-1749182184793, 11991887667273,-82588248514885,571118483653841] |