login
The OEIS is supported by
the many generous donors to the OEIS Foundation
.
Hints
(Greetings from
The On-Line Encyclopedia of Integer Sequences
!)
A064228
as a simple table
n
a(n)
1
0
2
1
3
2
4
4
5
19
6
61
7
879
8
1355
9
2406
[0,1,2,4,19,61,879,1355,2406]