A146180 - OEIS

A146180

Number of n X n binary arrays with all ones connected only in a 110-111-100 pattern in any orientation.

%I #4 Mar 31 2012 12:35:09

%S 1,1,9,33,113,1711,59971,1694043,74822217,7821008273,1319866139817,

%T 301739131956013,120737110736027887

%N Number of n X n binary arrays with all ones connected only in a 110-111-100 pattern in any orientation.

%e Maximal 8 X 8 example

%e .0.0.0.1.1.1.0.0

%e .1.1.1.0.1.1.0.0

%e .1.1.0.0.1.0.1.1

%e .0.1.0.0.0.1.1.1

%e .0.0.1.1.1.0.0.1

%e .0.1.0.1.1.0.1.0

%e .1.1.0.1.0.0.1.1

%e .1.1.1.0.0.1.1.1

%K nonn

%O 1,3

%A _R. H. Hardin_, Oct 27 2008