n | a(n) |
---|---|
0 | 0 |
1 | 1 |
2 | 2 |
3 | 19 |
4 | 68 |
5 | 421 |
6 | 1862 |
7 | 10039 |
8 | 48008 |
9 | 246601 |
10 | 1213322 |
11 | 6125659 |
12 | 30451148 |
13 | 152787181 |
14 | 762341582 |
15 | 3816490879 |
16 | 19068105488 |
17 | 95383574161 |
18 | 476788730642 |
19 | 2384331073699 |
20 | 11920493107028 |
21 | 59605952319541 |
22 | 298019301244502 |
[0,1,2,19,68,421,1862,10039,48008,246601,1213322, 6125659,30451148,152787181,762341582,3816490879, 19068105488,95383574161,476788730642, 2384331073699,11920493107028,59605952319541, 298019301244502] |