n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 1 |
3 | 2 |
4 | 5 |
5 | 14 |
6 | 41 |
7 | 123 |
8 | 375 |
9 | 1158 |
10 | 3615 |
11 | 11393 |
12 | 36209 |
13 | 115940 |
14 | 373709 |
15 | 1211740 |
16 | 3949969 |
17 | 12937612 |
18 | 42558745 |
19 | 140547051 |
20 | 465799527 |
21 | 1548766044 |
22 | 5164917003 |
23 | 17271369744 |
24 | 57900615135 |
25 | 194558333460 |
26 | 655168354935 |
27 | 2210681734671 |
[1,1,1,2,5,14,41,123,375,1158,3615,11393,36209, 115940,373709,1211740,3949969,12937612,42558745, 140547051,465799527,1548766044,5164917003, 17271369744,57900615135,194558333460,655168354935, 2210681734671] |