n | a(n) |
---|---|
0 | 1 |
1 | 2 |
2 | 6 |
3 | 21 |
4 | 75 |
5 | 273 |
6 | 1009 |
7 | 3770 |
8 | 14202 |
9 | 53846 |
10 | 205216 |
11 | 785460 |
12 | 3017106 |
13 | 11624580 |
14 | 44905518 |
15 | 173863965 |
16 | 674506059 |
17 | 2621371005 |
18 | 10203609597 |
19 | 39773263035 |
20 | 155231706951 |
21 | 606554343495 |
22 | 2372544034143 |
23 | 9289131196485 |
24 | 36401388236461 |
[1,2,6,21,75,273,1009,3770,14202,53846,205216, 785460,3017106,11624580,44905518,173863965, 674506059,2621371005,10203609597,39773263035, 155231706951,606554343495,2372544034143, 9289131196485,36401388236461] |