n | a(n) |
---|---|
0 | 1 |
1 | 0 |
2 | -1 |
3 | -2 |
4 | -5 |
5 | -12 |
6 | -29 |
7 | -70 |
8 | -169 |
9 | -408 |
10 | -985 |
11 | -2378 |
12 | -5741 |
13 | -13860 |
14 | -33461 |
15 | -80782 |
16 | -195025 |
17 | -470832 |
18 | -1136689 |
19 | -2744210 |
20 | -6625109 |
21 | -15994428 |
22 | -38613965 |
23 | -93222358 |
24 | -225058681 |
25 | -543339720 |
26 | -1311738121 |
27 | -3166815962 |
28 | -7645370045 |
[1,0,-1,-2,-5,-12,-29,-70,-169,-408,-985,-2378, -5741,-13860,-33461,-80782,-195025,-470832, -1136689,-2744210,-6625109,-15994428,-38613965, -93222358,-225058681,-543339720,-1311738121, -3166815962,-7645370045] |