login
The OEIS is supported by
the many generous donors to the OEIS Foundation
.
Hints
(Greetings from
The On-Line Encyclopedia of Integer Sequences
!)
A002877
as a simple table
n
a(n)
1
1
2
1
3
2
4
3
5
6
6
13
7
35
8
116
[1,1,2,3,6,13,35,116]