login
The OEIS is supported by
the many generous donors to the OEIS Foundation
.
Hints
(Greetings from
The On-Line Encyclopedia of Integer Sequences
!)
A191148
as a simple table
n
a(n)
1
1
2
3
3
15
4
86
5
522
6
3241
7
20256
8
126520
[1,3,15,86,522,3241,20256,126520]