n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 3 |
3 | 8 |
4 | 24 |
5 | 71 |
6 | 224 |
7 | 710 |
8 | 2318 |
9 | 7659 |
10 | 25703 |
11 | 87153 |
12 | 298574 |
13 | 1031104 |
14 | 3587263 |
15 | 12558652 |
16 | 44214807 |
17 | 156438309 |
18 | 555973965 |
19 | 1983817178 |
20 | 7104313970 |
21 | 25525304569 |
22 | 91986529421 |
23 | 332408847422 |
24 | 1204259931815 |
25 | 4373027942634 |
26 | 15914143511582 |
27 | 58030451159889 |
[1,1,3,8,24,71,224,710,2318,7659,25703,87153, 298574,1031104,3587263,12558652,44214807, 156438309,555973965,1983817178,7104313970, 25525304569,91986529421,332408847422, 1204259931815,4373027942634,15914143511582, 58030451159889] |