login
The OEIS is supported by
the many generous donors to the OEIS Foundation
.
Hints
(Greetings from
The On-Line Encyclopedia of Integer Sequences
!)
A218235
as a simple table
n
a(n)
1
1
2
15
3
511
4
65535
5
33552513
6
68715299265
7
562915602593793
[1,15,511,65535,33552513,68715299265, 562915602593793]
