n | a(n) |
---|---|
1 | 1 |
2 | 1 |
3 | 2 |
4 | 6 |
5 | 24 |
6 | 118 |
7 | 686 |
8 | 4598 |
9 | 34872 |
10 | 295044 |
11 | 2753958 |
12 | 28103804 |
13 | 311216626 |
14 | 3716341042 |
15 | 47597786154 |
16 | 650812077852 |
17 | 9461423560788 |
18 | 145724617925326 |
19 | 2370293673319292 |
20 | 40600119927220706 |
21 | 730458115445479734 |
[1,1,2,6,24,118,686,4598,34872,295044,2753958, 28103804,311216626,3716341042,47597786154, 650812077852,9461423560788,145724617925326, 2370293673319292,40600119927220706, 730458115445479734] |