n | a(n) |
---|---|
0 | 1 |
1 | 9 |
2 | 54 |
3 | 273 |
4 | 1197 |
5 | 4761 |
6 | 17577 |
7 | 60957 |
8 | 200799 |
9 | 633007 |
10 | 1920510 |
11 | 5633667 |
12 | 16037700 |
13 | 44439840 |
14 | 120165858 |
15 | 317762553 |
16 | 823240341 |
17 | 2092864401 |
18 | 5228118701 |
19 | 12848849154 |
20 | 31100190048 |
21 | 74208885351 |
22 | 174708121455 |
23 | 406132690635 |
24 | 932871440739 |
25 | 2118595079790 |
26 | 4759875472491 |
[1,9,54,273,1197,4761,17577,60957,200799,633007, 1920510,5633667,16037700,44439840,120165858, 317762553,823240341,2092864401,5228118701, 12848849154,31100190048,74208885351,174708121455, 406132690635,932871440739,2118595079790, 4759875472491] |