n | a(n) |
---|---|
0 | 1 |
1 | 2 |
2 | 6 |
3 | 24 |
4 | 114 |
5 | 618 |
6 | 3732 |
7 | 24702 |
8 | 177126 |
9 | 1363740 |
10 | 11195286 |
11 | 97437138 |
12 | 894857712 |
13 | 8637708858 |
14 | 87333790686 |
15 | 922203924216 |
16 | 10144109299146 |
17 | 115972625504994 |
18 | 1375221840671220 |
19 | 16884112119546534 |
20 | 214270296662325534 |
21 | 2806600053170775372 |
22 | 37892025089041181982 |
[1,2,6,24,114,618,3732,24702,177126,1363740, 11195286,97437138,894857712,8637708858, 87333790686,922203924216,10144109299146, 115972625504994,1375221840671220, 16884112119546534,214270296662325534, 2806600053170775372,37892025089041181982] |