n | a(n) |
---|---|
1 | 1 |
2 | 2 |
3 | 6 |
4 | 16 |
5 | 53 |
6 | 156 |
7 | 491 |
8 | 1584 |
9 | 5286 |
10 | 17855 |
11 | 61405 |
12 | 214012 |
13 | 754731 |
14 | 2688307 |
15 | 9659023 |
16 | 34947356 |
17 | 127260566 |
18 | 465920651 |
19 | 1714294995 |
20 | 6335423798 |
21 | 23506865260 |
22 | 87534068725 |
23 | 327024845325 |
24 | 1225395355165 |
25 | 4604242172697 |
26 | 17343284212635 |
27 | 65480496260109 |
28 | 247755060623522 |
[1,2,6,16,53,156,491,1584,5286,17855,61405,214012, 754731,2688307,9659023,34947356,127260566, 465920651,1714294995,6335423798,23506865260, 87534068725,327024845325,1225395355165, 4604242172697,17343284212635,65480496260109, 247755060623522] |