A147043 - OEIS

A147043

Number of n X n binary arrays with all ones connected only in a 0100-1100-0111-0010 pattern in any orientation.

%I #4 Mar 31 2012 12:35:14

%S 1,1,1,5,17,45,273,2925,46625,908301,25944849,1141847565,74712257377,

%T 7074982666029,978286939049873,197925384324109741,58779837596021528865

%N Number of n X n binary arrays with all ones connected only in a 0100-1100-0111-0010 pattern in any orientation.

%e Maximal 8 X 8 example

%e .0.0.0.0.0.1.0.0

%e .0.0.1.0.1.1.1.0

%e .0.1.1.0.0.0.1.1

%e .0.0.1.1.1.0.1.0

%e .0.1.0.1.0.1.0.0

%e .1.1.0.0.1.1.1.0

%e .0.1.1.1.0.0.1.1

%e .0.0.1.0.0.0.1.0

%K nonn

%O 1,4

%A _R. H. Hardin_, Nov 04 2008