login
The OEIS is supported by
the many generous donors to the OEIS Foundation
.
Hints
(Greetings from
The On-Line Encyclopedia of Integer Sequences
!)
A022562
as a simple table
n
a(n)
1
1
2
1
3
2
4
5
5
14
6
50
7
191
8
881
9
4494
10
26389
11
184749
12
1728404
13
23805256
14
491544474
15
14491876320
[1,1,2,5,14,50,191,881,4494,26389,184749,1728404, 23805256,491544474,14491876320]