A146579 - OEIS

A146579

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

%I #4 Mar 31 2012 12:35:11

%S 1,1,1,1,1,1,19,35,679,1365,22713,61459,2460007,8324377,1000960863,

%T 4362315603,920463675841,5070018879619,1889649557770845,

%U 13120916750335663,10628808830660687857,93523395817222374455

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

%e Maximal 8 X 8 example

%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 .0.0.1.0.0.1.0.0

%e .1.0.1.0.0.1.0.1

%e .1.0.0.0.0.0.0.1

%e .1.1.1.0.0.1.1.1

%e .0.1.0.0.0.0.1.0

%K nonn

%O 1,7

%A _R. H. Hardin_, Nov 04 2008