n | a(n) |
---|---|
0 | 1 |
1 | 3 |
2 | 9 |
3 | 31 |
4 | 120 |
5 | 514 |
6 | 2407 |
7 | 12205 |
8 | 66491 |
9 | 386699 |
10 | 2388096 |
11 | 15589732 |
12 | 107165081 |
13 | 773106715 |
14 | 5836100685 |
15 | 45981026703 |
16 | 377230766908 |
17 | 3215977070706 |
18 | 28437411817135 |
19 | 260380616093533 |
20 | 2464930698184351 |
21 | 24091925888687459 |
22 | 242802079705721156 |
23 | 2520198597834860148 |
[1,3,9,31,120,514,2407,12205,66491,386699,2388096, 15589732,107165081,773106715,5836100685, 45981026703,377230766908,3215977070706, 28437411817135,260380616093533,2464930698184351, 24091925888687459,242802079705721156, 2520198597834860148] |