n | a(n) |
---|---|
2 | 2 |
3 | 9 |
4 | 27 |
5 | 132 |
6 | 891 |
7 | 5442 |
8 | 35353 |
9 | 225590 |
10 | 1461709 |
11 | 9642529 |
12 | 64534830 |
13 | 436976910 |
14 | 2988280503 |
15 | 20606688810 |
16 | 143165924506 |
[2,9,27,132,891,5442,35353,225590,1461709,9642529, 64534830,436976910,2988280503,20606688810, 143165924506] |