login
The OEIS is supported by
the many generous donors to the OEIS Foundation
.
Hints
(Greetings from
The On-Line Encyclopedia of Integer Sequences
!)
A002090
as a simple table
n
a(n)
1
3
2
4
3
6
4
11
5
45
6
906
7
409182
8
83762797735
[3,4,6,11,45,906,409182,83762797735]
