n | a(n) |
---|---|
1 | 1 |
2 | 7 |
3 | 28 |
4 | 115 |
5 | 406 |
6 | 1492 |
7 | 5104 |
8 | 17611 |
9 | 59077 |
10 | 197242 |
11 | 649540 |
12 | 2127364 |
13 | 6908734 |
14 | 22325632 |
15 | 71744968 |
16 | 229600123 |
17 | 731794258 |
18 | 2324583475 |
19 | 7360989292 |
20 | 23245426690 |
21 | 73222477552 |
22 | 230128420012 |
23 | 721764371008 |
24 | 2259438436708 |
25 | 7060738412431 |
26 | 22029510754258 |
27 | 68630377423960 |
[1,7,28,115,406,1492,5104,17611,59077,197242, 649540,2127364,6908734,22325632,71744968, 229600123,731794258,2324583475,7360989292, 23245426690,73222477552,230128420012,721764371008, 2259438436708,7060738412431,22029510754258, 68630377423960] |