A147185 - OEIS

A147185

Number of n X n binary arrays with all ones connected only in a 11000-01110-00011 pattern in any orientation.

%I #4 Mar 31 2012 12:35:15

%S 1,1,1,1,13,61,329,2787,39701,747265,18941331,668354617,33772020165

%N Number of n X n binary arrays with all ones connected only in a 11000-01110-00011 pattern in any orientation.

%e Maximal 8 X 8 example

%e .1.1.0.0.0.0.0.1

%e .0.1.1.1.0.0.1.1

%e .0.0.0.1.1.0.1.0

%e .1.0.0.0.0.1.1.0

%e .1.1.0.0.0.1.0.0

%e .0.1.0.1.1.0.0.0

%e .0.1.1.0.1.1.1.0

%e .0.0.1.0.0.0.1.1

%K nonn

%O 1,5

%A _R. H. Hardin_, Nov 04 2008