n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 2 |
3 | 6 |
4 | 17 |
5 | 57 |
6 | 205 |
7 | 745 |
8 | 2875 |
9 | 11305 |
10 | 45332 |
11 | 186380 |
12 | 774303 |
13 | 3267037 |
14 | 13949978 |
15 | 60078464 |
16 | 261420213 |
17 | 1145680231 |
18 | 5056693164 |
19 | 22468775276 |
20 | 100367233789 |
21 | 450802933329 |
22 | 2034271914025 |
23 | 9219038987323 |
24 | 41952247315081 |
25 | 191591933975581 |
26 | 878015079137772 |
27 | 4036487462078620 |
28 | 18610889183478567 |
[1,1,2,6,17,57,205,745,2875,11305,45332,186380, 774303,3267037,13949978,60078464,261420213, 1145680231,5056693164,22468775276,100367233789, 450802933329,2034271914025,9219038987323, 41952247315081,191591933975581,878015079137772, 4036487462078620,18610889183478567] |