n | a(n) |
---|---|
1 | 1 |
2 | 2 |
3 | 6 |
4 | 19 |
5 | 61 |
6 | 196 |
7 | 629 |
8 | 2017 |
9 | 6466 |
10 | 20727 |
11 | 66441 |
12 | 212980 |
13 | 682721 |
14 | 2188509 |
15 | 7015418 |
16 | 22488411 |
17 | 72088165 |
18 | 231083620 |
19 | 740754589 |
20 | 2374540265 |
21 | 7611753682 |
22 | 24400004911 |
23 | 78215909841 |
24 | 250726529556 |
25 | 803721298537 |
26 | 2576384425157 |
27 | 8258779154250 |
28 | 26474089989299 |
[1,2,6,19,61,196,629,2017,6466,20727,66441,212980, 682721,2188509,7015418,22488411,72088165, 231083620,740754589,2374540265,7611753682, 24400004911,78215909841,250726529556,803721298537, 2576384425157,8258779154250,26474089989299] |