login
The OEIS is supported by
the many generous donors to the OEIS Foundation
.
Hints
(Greetings from
The On-Line Encyclopedia of Integer Sequences
!)
A376349
as a simple table
n
a(n)
0
1
1
2
2
5
3
15
4
54
5
247
6
1684
7
21820
8
1118964
[1,2,5,15,54,247,1684,21820,1118964]