n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 2 |
3 | 5 |
4 | 15 |
5 | 52 |
6 | 203 |
7 | 877 |
8 | 4140 |
9 | 21147 |
10 | 115975 |
11 | 678569 |
12 | 4213530 |
13 | 27641927 |
14 | 190829797 |
15 | 1381367941 |
16 | 10448276360 |
17 | 82285618467 |
18 | 672294831619 |
19 | 5676711562593 |
20 | 49344452550230 |
21 | 439841775811967 |
22 | 4005444732928641 |
23 | 37136385907400125 |
24 | 349459367068932740 |
[1,1,2,5,15,52,203,877,4140,21147,115975,678569, 4213530,27641927,190829797,1381367941,10448276360, 82285618467,672294831619,5676711562593, 49344452550230,439841775811967,4005444732928641, 37136385907400125,349459367068932740] |