n | a(n) |
---|---|
0 | 1 |
1 | 2 |
2 | 4 |
3 | 10 |
4 | 30 |
5 | 102 |
6 | 374 |
7 | 1430 |
8 | 5590 |
9 | 22102 |
10 | 87894 |
11 | 350550 |
12 | 1400150 |
13 | 5596502 |
14 | 22377814 |
15 | 89494870 |
16 | 357946710 |
17 | 1431721302 |
18 | 5726754134 |
19 | 22906754390 |
20 | 91626493270 |
21 | 366504924502 |
22 | 1466017600854 |
23 | 5864066209110 |
24 | 23456256447830 |
25 | 93825009014102 |
26 | 375300002501974 |
[1,2,4,10,30,102,374,1430,5590,22102,87894,350550, 1400150,5596502,22377814,89494870,357946710, 1431721302,5726754134,22906754390,91626493270, 366504924502,1466017600854,5864066209110, 23456256447830,93825009014102,375300002501974] |