A146444 - OEIS

A146444

Number of n X n binary arrays symmetric under 180 degree rotation with all ones connected only in a 1100-0100-0111 pattern in any orientation.

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

%S 1,1,1,1,5,17,61,319,1657,10301,78887,808895,10915803,187729525,

%T 3870401483

%N Number of n X n binary arrays symmetric under 180 degree rotation with all ones connected only in a 1100-0100-0111 pattern in any orientation.

%e Maximal 8 X 8 example

%e .0.0.0.0.1.1.1.0

%e .1.0.0.0.0.0.1.0

%e .1.0.0.0.0.0.1.1

%e .1.1.1.0.0.1.0.0

%e .0.0.1.0.0.1.1.1

%e .1.1.0.0.0.0.0.1

%e .0.1.0.0.0.0.0.1

%e .0.1.1.1.0.0.0.0

%K nonn

%O 1,5

%A _R. H. Hardin_