n | a(n) |
---|---|
0 | 0 |
1 | 0 |
2 | 2 |
3 | 6 |
4 | 38 |
5 | 130 |
6 | 662 |
7 | 2380 |
8 | 11174 |
9 | 41226 |
10 | 185642 |
11 | 695860 |
12 | 3055670 |
13 | 11576916 |
14 | 49995220 |
15 | 190876696 |
16 | 814610854 |
17 | 3128164186 |
18 | 13233277634 |
19 | 51046844836 |
20 | 214488337418 |
21 | 830382690556 |
22 | 3470405605900 |
23 | 13475470680616 |
24 | 56073057254198 |
25 | 218269673491780 |
[0,0,2,6,38,130,662,2380,11174,41226,185642, 695860,3055670,11576916,49995220,190876696, 814610854,3128164186,13233277634,51046844836, 214488337418,830382690556,3470405605900, 13475470680616,56073057254198,218269673491780] |