login
The OEIS is supported by
the many generous donors to the OEIS Foundation
.
Hints
(Greetings from
The On-Line Encyclopedia of Integer Sequences
!)
A229564
as a simple table
n
a(n)
1
1
2
42
3
920
4
20272
5
431328
6
7867328
[1,42,920,20272,431328,7867328]