n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 3 |
3 | 14 |
4 | 45 |
5 | 464 |
6 | 3550 |
7 | 29707 |
8 | 427301 |
9 | 3875888 |
10 | 56757846 |
11 | 840578309 |
12 | 10323922752 |
13 | 189319407367 |
14 | 3140779126927 |
15 | 49823384411504 |
16 | 963865765192269 |
17 | 19807564912135088 |
18 | 369495116959595638 |
19 | 7315713260968811101 |
20 | 179465411474223353936 |
21 | 3913329579600044947481 |
[1,1,3,14,45,464,3550,29707,427301,3875888, 56757846,840578309,10323922752,189319407367, 3140779126927,49823384411504,963865765192269, 19807564912135088,369495116959595638, 7315713260968811101,179465411474223353936, 3913329579600044947481] |