A147338 - OEIS

A147338

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

%I #4 Mar 31 2012 12:35:16

%S 1,1,1,1,9,25,57,341,3079,34841,488119,8511553,213350177,7487333931,

%T 351333499149

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

%e Maximal 8 X 8 example

%e .0.0.1.0.0.0.0.0

%e .0.0.1.1.1.0.0.0

%e .1.1.1.0.0.0.0.0

%e .0.0.1.0.0.0.1.0

%e .0.0.0.0.0.0.1.0

%e .0.0.0.0.1.1.1.1

%e .0.0.0.0.0.1.0.0

%K nonn

%O 1,5

%A _R. H. Hardin_