login
The OEIS is supported by
the many generous donors to the OEIS Foundation
.
Hints
(Greetings from
The On-Line Encyclopedia of Integer Sequences
!)
A390999
as a simple table
n
a(n)
1
2
2
5
3
19
4
110
5
679
6
4787
7
34769
8
260810
9
1986798
[2,5,19,110,679,4787,34769,260810,1986798]
