login
The OEIS is supported by
the many generous donors to the OEIS Foundation
.
Hints
(Greetings from
The On-Line Encyclopedia of Integer Sequences
!)
A124436
as a simple table
n
a(n)
1
1
2
2
3
4
4
16
5
1458
6
2918430506250
7
7164640537512654203797788776525821310188011060
[1,2,4,16,1458,2918430506250, 7164640537512654203797788776525821310188011060]