n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 3 |
3 | 10 |
4 | 33 |
5 | 124 |
6 | 478 |
7 | 1876 |
8 | 7653 |
9 | 31520 |
10 | 131923 |
11 | 560361 |
12 | 2397177 |
13 | 10362660 |
14 | 45122797 |
15 | 197619125 |
16 | 871134632 |
17 | 3857758844 |
18 | 17160398867 |
19 | 76658932408 |
20 | 343609269081 |
21 | 1545368262356 |
22 | 6971119129314 |
23 | 31529648390000 |
24 | 142971072421910 |
25 | 649780474978174 |
26 | 2959380924404418 |
27 | 13505223883964250 |
[1,1,3,10,33,124,478,1876,7653,31520,131923, 560361,2397177,10362660,45122797,197619125, 871134632,3857758844,17160398867,76658932408, 343609269081,1545368262356,6971119129314, 31529648390000,142971072421910,649780474978174, 2959380924404418,13505223883964250] |