n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 6 |
3 | 11 |
4 | 71 |
5 | 131 |
6 | 846 |
7 | 1561 |
8 | 10081 |
9 | 18601 |
10 | 120126 |
11 | 221651 |
12 | 1431431 |
13 | 2641211 |
14 | 17057046 |
15 | 31472881 |
16 | 203253121 |
17 | 375033361 |
18 | 2421980406 |
19 | 4468927451 |
20 | 28860511751 |
21 | 53252096051 |
22 | 343904160606 |
23 | 634556225161 |
24 | 4097989415521 |
[1,1,6,11,71,131,846,1561,10081,18601,120126, 221651,1431431,2641211,17057046,31472881, 203253121,375033361,2421980406,4468927451, 28860511751,53252096051,343904160606,634556225161, 4097989415521] |