A147147 - OEIS

A147147

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

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

%S 1,1,1,9,33,121,1109,21917,638145,19928333,1044135195,95057962687,

%T 13578889854579

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

%e Maximal 8 X 8 example

%e .0.0.1.0.1.1.0.0

%e .0.1.1.1.0.1.1.0

%e .1.1.0.0.0.0.1.1

%e .1.0.0.0.0.0.1.0

%e .0.1.0.0.0.0.0.1

%e .1.1.0.0.0.0.1.1

%e .0.1.1.0.1.1.1.0

%e .0.0.1.1.0.1.0.0

%K nonn

%O 1,4

%A _R. H. Hardin_, Nov 04 2008