login
The OEIS is supported by
the many generous donors to the OEIS Foundation
.
Hints
(Greetings from
The On-Line Encyclopedia of Integer Sequences
!)
A372853
as a simple table
n
a(n)
1
1
2
1
3
2
4
6
5
15
6
51
7
206
8
1297
9
11742
10
143095
11
2056120
12
32337106
[1,1,2,6,15,51,206,1297,11742,143095,2056120, 32337106]