n | a(n) |
---|---|
1 | 0 |
2 | 6 |
3 | 25 |
4 | 90 |
5 | 295 |
6 | 945 |
7 | 2995 |
8 | 9450 |
9 | 29749 |
10 | 93555 |
11 | 294058 |
12 | 924041 |
13 | 2903320 |
14 | 9121612 |
15 | 28657269 |
16 | 90030844 |
17 | 282842403 |
18 | 888579011 |
19 | 2791558622 |
20 | 8769948429 |
21 | 27551618702 |
22 | 86555983552 |
23 | 271923674474 |
24 | 854273468992 |
25 | 2683779334331 |
26 | 8431341566236 |
27 | 26487840921750 |
28 | 83214006759229 |
29 | 261424512797515 |
[0,6,25,90,295,945,2995,9450,29749,93555,294058, 924041,2903320,9121612,28657269,90030844, 282842403,888579011,2791558622,8769948429, 27551618702,86555983552,271923674474,854273468992, 2683779334331,8431341566236,26487840921750, 83214006759229,261424512797515] |