A146917 - OEIS

A146917

Number of n X n binary arrays with all ones connected only in a 0110-1111-0110 pattern in any orientation.

%I #4 Mar 31 2012 12:35:14

%S 1,1,1,5,13,33,189,1504,14808,192345,3378235,83510270,2816813223,

%T 127717175896,7956430608952,672733591665214,77219550936345236

%N Number of n X n binary arrays with all ones connected only in a 0110-1111-0110 pattern in any orientation.

%e Maximal 8 X 8 example

%e .0.1.1.0.0.0.1.0

%e .1.1.1.1.0.1.1.1

%e .0.1.1.0.0.1.1.1

%e .0.0.0.0.0.0.1.0

%e .0.1.0.0.0.0.0.0

%e .1.1.1.0.0.1.1.0

%e .1.1.1.0.1.1.1.1

%e .0.1.0.0.0.1.1.0

%K nonn

%O 1,4

%A _R. H. Hardin_, Nov 04 2008