login
The OEIS is supported by
the many generous donors to the OEIS Foundation
.
Hints
(Greetings from
The On-Line Encyclopedia of Integer Sequences
!)
A006267
as a simple table
n
a(n)
0
1
1
4
2
76
3
439204
4
84722519070079276
5
608130213374088941214747405817720942127490792974404
[1,4,76,439204,84722519070079276, 60813021337408894121474740581772094212749079297440\ 4]