login
The OEIS is supported by
the many generous donors to the OEIS Foundation
.
Hints
(Greetings from
The On-Line Encyclopedia of Integer Sequences
!)
A155296
as a simple table
n
a(n)
5
1
6
7
7
19
8
70
9
328
10
1523
11
7988
12
53382
13
440756
14
4250070
15
49171805
16
677879590
17
10958762075
[1,7,19,70,328,1523,7988,53382,440756,4250070, 49171805,677879590,10958762075]