A147153 - OEIS

A147153

Number of n X n binary arrays symmetric under 90 degree rotation with all ones connected only in a 1000-1100-0111-0010 pattern in any orientation.

%I #4 Mar 31 2012 12:35:15

%S 1,1,1,1,1,1,1,5,29,53,103,395,1381,4229,19741,89165,570891,3054965,

%T 21029525,147769545,1255506947

%N Number of n X n binary arrays symmetric under 90 degree rotation with all ones connected only in a 1000-1100-0111-0010 pattern in any orientation.

%e Maximal 8 X 8 example

%e .0.0.0.1.1.0.0.0

%e .0.0.1.0.1.1.0.0

%e .0.1.1.1.0.1.1.0

%e .1.1.0.0.0.1.0.1

%e .1.0.1.0.0.0.1.1

%e .0.1.1.0.1.1.1.0

%e .0.0.1.1.0.1.0.0

%e .0.0.0.1.1.0.0.0

%K nonn

%O 1,8

%A _R. H. Hardin_, Nov 04 2008