n | a(n) |
---|---|
1 | 1 |
2 | 2 |
3 | 4 |
4 | 12 |
5 | 40 |
6 | 184 |
7 | 1296 |
8 | 17072 |
9 | 424992 |
10 | 20314096 |
11 | 1836858752 |
12 | 310029536960 |
13 | 97286240288512 |
14 | 56843800957620672 |
15 | 62057188173197829888 |
16 | 127071179605916892107264 |
17 | 489838590133142165412740096 |
18 | 3566828190793813383233169950592 |
19 | 49211415580467941255510544567667200 |
[1,2,4,12,40,184,1296,17072,424992,20314096, 1836858752,310029536960,97286240288512, 56843800957620672,62057188173197829888, 127071179605916892107264, 489838590133142165412740096, 3566828190793813383233169950592, 49211415580467941255510544567667200] |