n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 2 |
3 | 6 |
4 | 14 |
5 | 30 |
6 | 40 |
7 | 55 |
8 | 247 |
9 | 488 |
10 | 818 |
11 | 1652 |
12 | 4060 |
13 | 3754 |
14 | 15748 |
15 | 20161 |
16 | 20128 |
17 | 85861 |
18 | 159827 |
19 | 211265 |
20 | 620076 |
21 | 993084 |
22 | 1487646 |
23 | 2542051 |
24 | 12137774 |
25 | 28169497 |
26 | 32223531 |
27 | 87591110 |
28 | 232647749 |
29 | 379598603 |
30 | 877039442 |
[1,1,2,6,14,30,40,55,247,488,818,1652,4060,3754, 15748,20161,20128,85861,159827,211265,620076, 993084,1487646,2542051,12137774,28169497,32223531, 87591110,232647749,379598603,877039442] |