login
The OEIS is supported by
the many generous donors to the OEIS Foundation
.
Hints
(Greetings from
The On-Line Encyclopedia of Integer Sequences
!)
A203220
as a simple table
n
a(n)
1
1
2
4
3
28
4
463
5
20863
6
1908018
7
410029022
8
207200580086
9
237986115130053
[1,4,28,463,20863,1908018,410029022,207200580086, 237986115130053]