n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 6 |
3 | 11 |
4 | 66 |
5 | 146 |
6 | 876 |
7 | 2131 |
8 | 12786 |
9 | 32966 |
10 | 197796 |
11 | 530526 |
12 | 3183156 |
13 | 8786436 |
14 | 52718616 |
15 | 148733571 |
16 | 892401426 |
17 | 2561439806 |
18 | 15368638836 |
19 | 44731364266 |
20 | 268388185596 |
21 | 790211926076 |
22 | 4741271556456 |
23 | 14095578557486 |
[1,1,6,11,66,146,876,2131,12786,32966,197796, 530526,3183156,8786436,52718616,148733571, 892401426,2561439806,15368638836,44731364266, 268388185596,790211926076,4741271556456, 14095578557486] |