n | a(n) |
---|---|
1 | 1 |
2 | 2 |
3 | 6 |
4 | 22 |
5 | 84 |
6 | 308 |
7 | 1090 |
8 | 3782 |
9 | 13000 |
10 | 44504 |
11 | 152102 |
12 | 519506 |
13 | 1773948 |
14 | 6056932 |
15 | 20680010 |
16 | 70606382 |
17 | 241065744 |
18 | 823050480 |
19 | 2810070734 |
20 | 9594182314 |
21 | 32756588164 |
22 | 111837988444 |
23 | 381838777906 |
24 | 1303679135238 |
25 | 4451038985688 |
26 | 15196797672872 |
27 | 51885112720758 |
28 | 177146855537986 |
[1,2,6,22,84,308,1090,3782,13000,44504,152102, 519506,1773948,6056932,20680010,70606382, 241065744,823050480,2810070734,9594182314, 32756588164,111837988444,381838777906, 1303679135238,4451038985688,15196797672872, 51885112720758,177146855537986] |