A147512 - OEIS

A147512

Number of n X n binary arrays symmetric under 180 degree rotation with all ones connected only in a 11110-01111 pattern in any orientation.

%I #4 Mar 31 2012 12:35:17

%S 1,1,1,1,5,9,25,59,279,1153,8111,46003,371173,2930355,33533835,

%T 383283501

%N Number of n X n binary arrays symmetric under 180 degree rotation with all ones connected only in a 11110-01111 pattern in any orientation.

%e Maximal 8 X 8 example

%e .1.1.1.1.0.0.0.1

%e .0.1.1.1.1.0.1.1

%e .0.0.0.0.0.0.1.1

%e .0.1.0.0.0.0.1.1

%e .1.1.0.0.0.0.1.0

%e .1.1.0.0.0.0.0.0

%e .1.1.0.1.1.1.1.0

%e .1.0.0.0.1.1.1.1

%K nonn

%O 1,5

%A _R. H. Hardin_