n | a(n) |
---|---|
1 | 1 |
2 | 1 |
3 | 2 |
4 | 4 |
5 | 10 |
6 | 26 |
7 | 73 |
8 | 211 |
9 | 630 |
10 | 1918 |
11 | 5944 |
12 | 18668 |
13 | 59311 |
14 | 190243 |
15 | 615269 |
16 | 2004025 |
17 | 6568174 |
18 | 21645438 |
19 | 71681152 |
20 | 238416580 |
21 | 796107464 |
22 | 2667768904 |
23 | 8968626418 |
24 | 30240087086 |
25 | 102238147891 |
26 | 346514952331 |
27 | 1177137322768 |
28 | 4007326361986 |
29 | 13669068510355 |
30 | 46711170248183 |
31 | 159899495303170 |
[1,1,2,4,10,26,73,211,630,1918,5944,18668,59311, 190243,615269,2004025,6568174,21645438,71681152, 238416580,796107464,2667768904,8968626418, 30240087086,102238147891,346514952331, 1177137322768,4007326361986,13669068510355, 46711170248183,159899495303170] |