n | a(n) |
---|---|
2 | 2 |
3 | 14 |
4 | 72 |
5 | 330 |
6 | 1430 |
7 | 6008 |
8 | 24786 |
9 | 101118 |
10 | 409640 |
11 | 1652090 |
12 | 6643782 |
13 | 26667864 |
14 | 106914242 |
15 | 428292590 |
16 | 1714834440 |
17 | 6863694378 |
18 | 27466183286 |
19 | 109894593848 |
20 | 439656551730 |
21 | 1758830875230 |
22 | 7035859329512 |
23 | 28144840135514 |
[2,14,72,330,1430,6008,24786,101118,409640, 1652090,6643782,26667864,106914242,428292590, 1714834440,6863694378,27466183286,109894593848, 439656551730,1758830875230,7035859329512, 28144840135514] |