n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 1 |
3 | 3 |
4 | 6 |
5 | 16 |
6 | 47 |
7 | 132 |
8 | 410 |
9 | 1254 |
10 | 4052 |
11 | 12818 |
12 | 42783 |
13 | 139082 |
14 | 469924 |
15 | 1563606 |
16 | 5353966 |
17 | 18065348 |
18 | 62491018 |
19 | 213391790 |
20 | 743836996 |
21 | 2565135934 |
22 | 8994087070 |
23 | 31251762932 |
24 | 110245063771 |
25 | 385443583008 |
26 | 1365151504722 |
27 | 4800376128986 |
28 | 17070221456536 |
29 | 60289267885410 |
[1,1,1,3,6,16,47,132,410,1254,4052,12818,42783, 139082,469924,1563606,5353966,18065348,62491018, 213391790,743836996,2565135934,8994087070, 31251762932,110245063771,385443583008, 1365151504722,4800376128986,17070221456536, 60289267885410] |