n | a(n) |
---|---|
0 | 1 |
1 | 2 |
2 | 3 |
3 | 7 |
4 | 16 |
5 | 39 |
6 | 98 |
7 | 252 |
8 | 659 |
9 | 1747 |
10 | 4682 |
11 | 12662 |
12 | 34505 |
13 | 94644 |
14 | 261069 |
15 | 723707 |
16 | 2014952 |
17 | 5631875 |
18 | 15796210 |
19 | 44444302 |
20 | 125405217 |
21 | 354765866 |
22 | 1006003375 |
23 | 2858939669 |
24 | 8141135778 |
25 | 23225997936 |
26 | 66376634429 |
27 | 190000938785 |
[1,2,3,7,16,39,98,252,659,1747,4682,12662,34505, 94644,261069,723707,2014952,5631875,15796210, 44444302,125405217,354765866,1006003375, 2858939669,8141135778,23225997936,66376634429, 190000938785] |