n | a(n) |
---|---|
0 | 0 |
1 | 2 |
2 | 2 |
3 | 6 |
4 | 12 |
5 | 30 |
6 | 72 |
7 | 182 |
8 | 462 |
9 | 1190 |
10 | 3080 |
11 | 8010 |
12 | 20880 |
13 | 54522 |
14 | 142506 |
15 | 372710 |
16 | 975156 |
17 | 2552006 |
18 | 6679640 |
19 | 17484942 |
20 | 45771990 |
21 | 119825862 |
22 | 313697232 |
23 | 821252306 |
24 | 2150037792 |
25 | 5628825650 |
26 | 14736381842 |
27 | 38580227142 |
28 | 101004149532 |
29 | 264431978670 |
[0,2,2,6,12,30,72,182,462,1190,3080,8010,20880, 54522,142506,372710,975156,2552006,6679640, 17484942,45771990,119825862,313697232,821252306, 2150037792,5628825650,14736381842,38580227142, 101004149532,264431978670] |