A147359 - OEIS

A147359

Number of n X n binary arrays symmetric under 180 degree rotation with all ones connected only in a 0110-0110-1111 pattern in any orientation.

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

%S 1,1,1,1,1,5,23,84,333,1104,4907,30924,222811,1874271,20520483

%N Number of n X n binary arrays symmetric under 180 degree rotation with all ones connected only in a 0110-0110-1111 pattern in any orientation.

%e Maximal 8 X 8 example

%e .0.0.1.1.1.1.0.0

%e .0.0.0.1.1.0.0.0

%e .1.0.0.1.1.0.0.1

%e .1.1.1.0.0.1.1.1

%e .1.0.0.1.1.0.0.1

%e .0.0.0.1.1.0.0.0

%e .0.0.1.1.1.1.0.0

%K nonn

%O 1,6

%A _R. H. Hardin_