A146722 - OEIS

A146722

Number of n X n binary arrays with all ones connected only in a 1101-0111 pattern in any orientation.

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

%S 1,1,1,25,197,1531,31791,876801,39890653,2918403939,324467879601

%N Number of n X n binary arrays with all ones connected only in a 1101-0111 pattern in any orientation.

%e Maximal 8 X 8 example

%e .1.1.1.0.1.1.0.1

%e .1.0.1.1.0.1.1.1

%e .0.0.0.0.0.0.0.0

%e .1.1.0.1.0.1.1.0

%e .0.1.0.1.1.1.0.1

%e .1.1.0.0.0.0.1.1

%e .1.0.1.1.1.0.1.0

%e .0.1.1.0.1.0.1.1

%K nonn

%O 1,4

%A _R. H. Hardin_, Nov 04 2008