login
The OEIS is supported by
the many generous donors to the OEIS Foundation
.
Hints
(Greetings from
The On-Line Encyclopedia of Integer Sequences
!)
A244507
as a simple table
n
a(n)
1
1
2
3
3
14
4
78
5
468
6
2907
7
18392
8
117645
9
757965
10
4908540
[1,3,14,78,468,2907,18392,117645,757965,4908540]