n | a(n) |
---|---|
0 | 1 |
1 | -2 |
2 | -2 |
3 | -2 |
4 | -6 |
5 | -10 |
6 | -34 |
7 | -82 |
8 | -254 |
9 | -730 |
10 | -2238 |
11 | -6826 |
12 | -21370 |
13 | -67122 |
14 | -213654 |
15 | -684258 |
16 | -2208694 |
17 | -7169298 |
18 | -23402738 |
19 | -76748130 |
20 | -252790518 |
21 | -835816658 |
22 | -2773236614 |
23 | -9230776706 |
24 | -30814377058 |
25 | -103139338858 |
26 | -346067984622 |
27 | -1163810570178 |
[1,-2,-2,-2,-6,-10,-34,-82,-254,-730,-2238,-6826, -21370,-67122,-213654,-684258,-2208694,-7169298, -23402738,-76748130,-252790518,-835816658, -2773236614,-9230776706,-30814377058, -103139338858,-346067984622,-1163810570178] |