login
The OEIS is supported by
the many generous donors to the OEIS Foundation
.
Hints
(Greetings from
The On-Line Encyclopedia of Integer Sequences
!)
A197161
as a simple table
n
a(n)
1
1
2
5
3
66
4
2573
5
331406
6
135820428
7
178698032203
8
752158409985973
9
10105549470186567265
[1,5,66,2573,331406,135820428,178698032203, 752158409985973,10105549470186567265]