login
The OEIS is supported by
the many generous donors to the OEIS Foundation
.
Hints
(Greetings from
The On-Line Encyclopedia of Integer Sequences
!)
A377923
as a simple table
n
a(n)
0
0
1
1
2
0
3
3
4
4
5
15
6
39
7
120
[0,1,0,3,4,15,39,120]
