login
The OEIS is supported by
the many generous donors to the OEIS Foundation
.
Hints
(Greetings from
The On-Line Encyclopedia of Integer Sequences
!)
A127503
as a simple table
n
a(n)
1
1
2
3
3
27
4
281
5
3945
6
70635
7
1437555
8
30357425
9
628337745
[1,3,27,281,3945,70635,1437555,30357425,628337745]