n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 3 |
3 | 13 |
4 | 67 |
5 | 382 |
6 | 2327 |
7 | 14855 |
8 | 98208 |
9 | 667180 |
10 | 4632647 |
11 | 32751382 |
12 | 235072482 |
13 | 1709232902 |
14 | 12568852562 |
15 | 93348649555 |
16 | 699485096637 |
17 | 5283685539096 |
18 | 40205412111227 |
19 | 308020225286402 |
20 | 2374795521493354 |
21 | 18419175004781334 |
[1,1,3,13,67,382,2327,14855,98208,667180,4632647, 32751382,235072482,1709232902,12568852562, 93348649555,699485096637,5283685539096, 40205412111227,308020225286402,2374795521493354, 18419175004781334] |