n | a(n) |
---|---|
1 | 1 |
2 | 1 |
3 | 2 |
4 | 3 |
5 | 4 |
6 | 21 |
7 | 40 |
8 | 60 |
9 | 344 |
10 | 706 |
11 | 1115 |
12 | 5961 |
13 | 12955 |
14 | 21430 |
15 | 105338 |
16 | 240405 |
17 | 415187 |
18 | 1882817 |
19 | 4477153 |
20 | 8046028 |
21 | 33915664 |
22 | 83437560 |
23 | 155547810 |
24 | 614501063 |
25 | 1554456963 |
26 | 2997410782 |
27 | 11186285623 |
28 | 28942766933 |
29 | 57570735736 |
30 | 204441596636 |
[1,1,2,3,4,21,40,60,344,706,1115,5961,12955,21430, 105338,240405,415187,1882817,4477153,8046028, 33915664,83437560,155547810,614501063,1554456963, 2997410782,11186285623,28942766933,57570735736, 204441596636] |