n | a(n) |
---|---|
1 | 1 |
2 | 2 |
3 | 3 |
4 | 7 |
5 | 16 |
6 | 56 |
7 | 204 |
8 | 884 |
9 | 4143 |
10 | 21164 |
11 | 115976 |
12 | 678631 |
13 | 4213598 |
14 | 27644642 |
15 | 190899340 |
16 | 1382959429 |
17 | 10480142148 |
18 | 82864874000 |
19 | 682076806160 |
20 | 5832742226226 |
21 | 51724158235578 |
22 | 474869816272728 |
23 | 4506715738447324 |
[1,2,3,7,16,56,204,884,4143,21164,115976,678631, 4213598,27644642,190899340,1382959429,10480142148, 82864874000,682076806160,5832742226226, 51724158235578,474869816272728,4506715738447324] |