A146365 - OEIS

A146365

Number of n X n binary arrays with all ones connected only in a 0100-1111-0010 pattern in any orientation.

%I #4 Mar 31 2012 12:35:10

%S 1,1,1,9,25,125,1323,18755,388143,11998517,573092271,41661958269,

%T 4471274578309,730746269407465,180950069008864743

%N Number of n X n binary arrays with all ones connected only in a 0100-1111-0010 pattern in any orientation.

%e Maximal 8 X 8 example

%e .0.1.0.0.0.1.0.0

%e .0.1.1.0.1.1.1.1

%e .1.1.0.0.0.0.1.0

%e .0.1.0.0.0.0.0.0

%e .0.0.1.0.0.0.0.0

%e .0.0.1.1.0.0.1.0

%e .0.1.1.0.1.1.1.1

%e .0.0.1.0.0.1.0.0

%K nonn

%O 1,4

%A _R. H. Hardin_