n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 1 |
3 | 2 |
4 | 5 |
5 | 12 |
6 | 33 |
7 | 98 |
8 | 305 |
9 | 1002 |
10 | 3424 |
11 | 12016 |
12 | 43230 |
13 | 158516 |
14 | 590621 |
15 | 2230450 |
16 | 8521967 |
17 | 32889238 |
18 | 128064009 |
19 | 502590642 |
20 | 1986357307 |
21 | 7900377892 |
22 | 31602819524 |
23 | 127076645038 |
24 | 513419837168 |
25 | 2083414420394 |
26 | 8488377206876 |
27 | 34712566540014 |
28 | 142443837953632 |
[1,1,1,2,5,12,33,98,305,1002,3424,12016,43230, 158516,590621,2230450,8521967,32889238,128064009, 502590642,1986357307,7900377892,31602819524, 127076645038,513419837168,2083414420394, 8488377206876,34712566540014,142443837953632] |