n | a(n) |
---|---|
0 | 1 |
1 | 2 |
2 | 6 |
3 | 15 |
4 | 36 |
5 | 91 |
6 | 225 |
7 | 554 |
8 | 1368 |
9 | 3375 |
10 | 8323 |
11 | 20527 |
12 | 50625 |
13 | 124851 |
14 | 307911 |
15 | 759375 |
16 | 1872779 |
17 | 4618672 |
18 | 11390625 |
19 | 28091696 |
20 | 69280082 |
21 | 170859375 |
22 | 421375453 |
23 | 1039201231 |
24 | 2562890625 |
25 | 6320631804 |
26 | 15588018473 |
27 | 38443359375 |
28 | 94809477068 |
29 | 233820277107 |
[1,2,6,15,36,91,225,554,1368,3375,8323,20527, 50625,124851,307911,759375,1872779,4618672, 11390625,28091696,69280082,170859375,421375453, 1039201231,2562890625,6320631804,15588018473, 38443359375,94809477068,233820277107] |