n | a(n) |
---|---|
0 | 1 |
1 | 2 |
2 | 5 |
3 | 18 |
4 | 66 |
5 | 240 |
6 | 960 |
7 | 3868 |
8 | 15717 |
9 | 66099 |
10 | 278019 |
11 | 1184631 |
12 | 5122091 |
13 | 22145476 |
14 | 96822325 |
15 | 426006332 |
16 | 1877617552 |
17 | 8342165233 |
18 | 37163619077 |
19 | 166066819583 |
20 | 745941334923 |
21 | 3355458551285 |
22 | 15145356845178 |
23 | 68575254267863 |
24 | 310903375989401 |
25 | 1413892090253073 |
26 | 6441832176113612 |
27 | 29393857347481750 |
[1,2,5,18,66,240,960,3868,15717,66099,278019, 1184631,5122091,22145476,96822325,426006332, 1877617552,8342165233,37163619077,166066819583, 745941334923,3355458551285,15145356845178, 68575254267863,310903375989401,1413892090253073, 6441832176113612,29393857347481750] |