n | a(n) |
---|---|
1 | 1 |
2 | 2 |
3 | 5 |
4 | 15 |
5 | 52 |
6 | 203 |
7 | 877 |
8 | 4140 |
9 | 21147 |
10 | 115975 |
11 | 678570 |
12 | 4213597 |
13 | 27644436 |
14 | 190899230 |
15 | 1382953889 |
16 | 10479970386 |
17 | 82859701769 |
18 | 681942165393 |
19 | 5829591731684 |
20 | 51656311613107 |
21 | 473501669531146 |
22 | 4480550589850064 |
23 | 43672799989835155 |
[1,2,5,15,52,203,877,4140,21147,115975,678570, 4213597,27644436,190899230,1382953889,10479970386, 82859701769,681942165393,5829591731684, 51656311613107,473501669531146,4480550589850064, 43672799989835155] |