login
The OEIS is supported by
the many generous donors to the OEIS Foundation
.
Hints
(Greetings from
The On-Line Encyclopedia of Integer Sequences
!)
A133414
as a simple table
n
a(n)
1
1
2
9
3
403840
4
3134895604437030
5
2672411782638277673724960927991328
[1,9,403840,3134895604437030, 2672411782638277673724960927991328]