login
Number of n X n binary arrays with all ones connected only in a 1100-1111 pattern in any orientation.
0

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

%S 1,1,1,29,221,2091,47147,1321607,74618535,6202582309,806462292673

%N Number of n X n binary arrays with all ones connected only in a 1100-1111 pattern in any orientation.

%e Maximal 8 X 8 example

%e .1.0.1.1.1.1.0.1

%e .1.0.1.1.0.0.0.1

%e .1.1.0.0.0.0.1.1

%e .1.1.0.0.0.0.1.1

%e .0.0.1.1.1.1.0.0

%e .0.0.1.1.0.0.0.0

%e .1.1.0.0.1.1.1.1

%e .1.1.1.1.0.0.1.1

%K nonn

%O 1,4

%A _R. H. Hardin_