login
The OEIS is supported by
the many generous donors to the OEIS Foundation
.
Hints
(Greetings from
The On-Line Encyclopedia of Integer Sequences
!)
A106275
as a simple table
n
a(n)
1
2
2
3
3
4
4
5
5
6
6
7
7
21
8
26
9
99
10
158
11
405
[2,3,4,5,6,7,21,26,99,158,405]