A146241 - OEIS

A146241

Number of n X n binary arrays symmetric under horizontal reflection with all ones connected only in a 110-111-010 pattern in any orientation.

%I #4 Mar 31 2012 12:35:09

%S 1,1,1,1,1,1,37,73,549,1155,18213,46753,1912543,6241489,625732277,

%T 2571374751,388840217669,1994859107661,608353553481999,

%U 3912610945442677,2428168209787780883,19568752353921733413,24097482751802550964553

%N Number of n X n binary arrays symmetric under horizontal reflection with all ones connected only in a 110-111-010 pattern in any orientation.

%e Maximal 8 X 8 example

%e .0.1.0.0.0.0.1.0

%e .1.1.1.0.0.1.1.1

%e .1.1.0.0.0.0.1.1

%e .0.0.0.0.0.0.0.0

%e .0.1.0.0.0.0.1.0

%e .1.1.1.0.0.1.1.1

%e .0.1.1.0.0.1.1.0

%K nonn

%O 1,7

%A _R. H. Hardin_