n | a(n) |
---|---|
0 | 1 |
1 | 2 |
2 | 6 |
3 | 19 |
4 | 60 |
5 | 188 |
6 | 589 |
7 | 1846 |
8 | 5786 |
9 | 18135 |
10 | 56840 |
11 | 178152 |
12 | 558377 |
13 | 1750106 |
14 | 5485310 |
15 | 17192459 |
16 | 53885860 |
17 | 168892996 |
18 | 529356757 |
19 | 1659148590 |
20 | 5200224626 |
21 | 16298923631 |
22 | 51085276240 |
23 | 160115201936 |
24 | 501844754065 |
25 | 1572918462066 |
26 | 4929955864374 |
27 | 15451827549123 |
[1,2,6,19,60,188,589,1846,5786,18135,56840,178152, 558377,1750106,5485310,17192459,53885860, 168892996,529356757,1659148590,5200224626, 16298923631,51085276240,160115201936,501844754065, 1572918462066,4929955864374,15451827549123] |