login
The OEIS is supported by
the many generous donors to the OEIS Foundation
.
Hints
(Greetings from
The On-Line Encyclopedia of Integer Sequences
!)
A221187
as a simple table
n
a(n)
1
4
2
107
3
2648
4
51924
5
928133
6
15638551
7
256020803
[4,107,2648,51924,928133,15638551,256020803]
