n | a(n) |
---|---|
0 | 0 |
1 | 1 |
2 | 9 |
3 | 61 |
4 | 369 |
5 | 2101 |
6 | 11529 |
7 | 61741 |
8 | 325089 |
9 | 1690981 |
10 | 8717049 |
11 | 44633821 |
12 | 227363409 |
13 | 1153594261 |
14 | 5835080169 |
15 | 29443836301 |
16 | 148292923329 |
17 | 745759583941 |
18 | 3745977788889 |
19 | 18798608421181 |
20 | 94267920012849 |
[0,1,9,61,369,2101,11529,61741,325089,1690981, 8717049,44633821,227363409,1153594261,5835080169, 29443836301,148292923329,745759583941, 3745977788889,18798608421181,94267920012849] |