login
The OEIS is supported by
the many generous donors to the OEIS Foundation
.
Hints
(Greetings from
The On-Line Encyclopedia of Integer Sequences
!)
A007753
as a simple table
n
a(n)
0
1
1
1
2
2
3
8
4
41672
5
378916495683075745757412513402693048
[1,1,2,8,41672, 378916495683075745757412513402693048]