n | a(n) |
---|---|
1 | 1 |
2 | -1 |
3 | 9 |
4 | -20 |
5 | 62 |
6 | -174 |
7 | 556 |
8 | -1660 |
9 | 4911 |
10 | -14693 |
11 | 44357 |
12 | -133053 |
13 | 398389 |
14 | -1195207 |
15 | 3587853 |
16 | -10763270 |
17 | 32283452 |
18 | -96850386 |
19 | 290570104 |
20 | -871710994 |
21 | 2615074146 |
22 | -7845220010 |
23 | 23535839600 |
24 | -70607518824 |
25 | 211822017739 |
26 | -635466060265 |
27 | 1906399774635 |
28 | -5719199303975 |
[1,-1,9,-20,62,-174,556,-1660,4911,-14693,44357, -133053,398389,-1195207,3587853,-10763270, 32283452,-96850386,290570104,-871710994, 2615074146,-7845220010,23535839600,-70607518824, 211822017739,-635466060265,1906399774635, -5719199303975] |