n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 3 |
3 | 9 |
4 | 31 |
5 | 121 |
6 | 540 |
7 | 2692 |
8 | 14938 |
9 | 91599 |
10 | 613393 |
11 | 4443653 |
12 | 34574511 |
13 | 287092372 |
14 | 2529894464 |
15 | 23546940208 |
16 | 230556268991 |
17 | 2366688840376 |
18 | 25394369705598 |
19 | 284078044017592 |
20 | 3305577581826931 |
21 | 39928510807691616 |
22 | 499751895103778173 |
[1,1,3,9,31,121,540,2692,14938,91599,613393, 4443653,34574511,287092372,2529894464,23546940208, 230556268991,2366688840376,25394369705598, 284078044017592,3305577581826931, 39928510807691616,499751895103778173] |