n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 4 |
3 | 11 |
4 | 39 |
5 | 141 |
6 | 531 |
7 | 2055 |
8 | 8184 |
9 | 33072 |
10 | 135841 |
11 | 564960 |
12 | 2375302 |
13 | 10076779 |
14 | 43089130 |
15 | 185560423 |
16 | 804020555 |
17 | 3502720054 |
18 | 15334927573 |
19 | 67435970381 |
20 | 297735390506 |
21 | 1319311878971 |
22 | 5865676338727 |
23 | 26158787600870 |
24 | 116986315652226 |
25 | 524545274062845 |
26 | 2357659835110416 |
27 | 10620661292397852 |
[1,1,4,11,39,141,531,2055,8184,33072,135841, 564960,2375302,10076779,43089130,185560423, 804020555,3502720054,15334927573,67435970381, 297735390506,1319311878971,5865676338727, 26158787600870,116986315652226,524545274062845, 2357659835110416,10620661292397852] |