n | a(n) |
---|---|
1 | 1 |
2 | 1 |
3 | 3 |
4 | 11 |
5 | 35 |
6 | 114 |
7 | 407 |
8 | 1486 |
9 | 5414 |
10 | 19923 |
11 | 74230 |
12 | 278462 |
13 | 1049318 |
14 | 3972395 |
15 | 15101658 |
16 | 57607431 |
17 | 220391316 |
18 | 845366406 |
19 | 3250192681 |
20 | 12521965697 |
[1,1,3,11,35,114,407,1486,5414,19923,74230,278462, 1049318,3972395,15101658,57607431,220391316, 845366406,3250192681,12521965697] |