login
The OEIS is supported by
the many generous donors to the OEIS Foundation
.
Hints
(Greetings from
The On-Line Encyclopedia of Integer Sequences
!)
A037295
as a simple table
n
a(n)
1
3
2
18
3
87
4
396
5
1677
6
6877
[3,18,87,396,1677,6877]