n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 4 |
3 | 14 |
4 | 67 |
5 | 343 |
6 | 2151 |
7 | 14900 |
8 | 119259 |
9 | 1055520 |
10 | 6837054 |
11 | 49975756 |
12 | 358031350 |
13 | 2673108092 |
14 | 20399335633 |
15 | 161247005007 |
16 | 1321885836686 |
17 | 10814140769210 |
18 | 93349395210404 |
19 | 726371063425227 |
20 | 5939975798740967 |
21 | 48195816632614079 |
22 | 396235068140514442 |
[1,1,4,14,67,343,2151,14900,119259,1055520, 6837054,49975756,358031350,2673108092,20399335633, 161247005007,1321885836686,10814140769210, 93349395210404,726371063425227,5939975798740967, 48195816632614079,396235068140514442] |