n | a(n) |
---|---|
1 | 1 |
2 | 4 |
3 | 28 |
4 | 234 |
5 | 2162 |
6 | 21272 |
7 | 218740 |
8 | 2323730 |
9 | 25314097 |
10 | 281345096 |
11 | 3178474308 |
12 | 36400646766 |
13 | 421693622520 |
14 | 4933625049464 |
15 | 58216226287844 |
16 | 692095652493483 |
[1,4,28,234,2162,21272,218740,2323730,25314097, 281345096,3178474308,36400646766,421693622520, 4933625049464,58216226287844,692095652493483] |