n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 3 |
3 | 13 |
4 | 60 |
5 | 275 |
6 | 1238 |
7 | 5480 |
8 | 23922 |
9 | 103267 |
10 | 441798 |
11 | 1876366 |
12 | 7921488 |
13 | 33275758 |
14 | 139194812 |
15 | 580180598 |
16 | 2410827422 |
17 | 9990993443 |
18 | 41308185542 |
19 | 170439003998 |
20 | 701953309592 |
21 | 2886284314298 |
22 | 11850433719572 |
23 | 48591008205608 |
24 | 199002198798980 |
25 | 814117064956430 |
[1,1,3,13,60,275,1238,5480,23922,103267,441798, 1876366,7921488,33275758,139194812,580180598, 2410827422,9990993443,41308185542,170439003998, 701953309592,2886284314298,11850433719572, 48591008205608,199002198798980,814117064956430] |