n | a(n) |
---|---|
1 | 1 |
2 | 6 |
3 | 21 |
4 | 71 |
5 | 216 |
6 | 672 |
7 | 1982 |
8 | 5817 |
9 | 16582 |
10 | 46633 |
11 | 128704 |
12 | 350665 |
13 | 941715 |
14 | 2499640 |
15 | 6557378 |
16 | 17024095 |
17 | 43756166 |
18 | 111433472 |
19 | 281303882 |
20 | 704320180 |
21 | 1749727370 |
22 | 4314842893 |
23 | 10565857064 |
24 | 25700414815 |
25 | 62115621317 |
26 | 149214574760 |
27 | 356354881511 |
28 | 846292135184 |
[1,6,21,71,216,672,1982,5817,16582,46633,128704, 350665,941715,2499640,6557378,17024095,43756166, 111433472,281303882,704320180,1749727370, 4314842893,10565857064,25700414815,62115621317, 149214574760,356354881511,846292135184] |