login
The OEIS is supported by
the many generous donors to the OEIS Foundation
.
Hints
(Greetings from
The On-Line Encyclopedia of Integer Sequences
!)
A018698
as a simple table
n
a(n)
1
1
2
2
3
3
4
4
5
6
6
12
7
73
8
146
9
219
10
292
11
438
12
876
[1,2,3,4,6,12,73,146,219,292,438,876]
