A146421 - OEIS

A146421

Number of n X n binary arrays with all ones connected only in a 1010-1111 pattern in any orientation.

%I #4 Mar 31 2012 12:35:10

%S 1,1,1,29,229,1773,39925,1086663,55544427,4442151653,513575103485

%N Number of n X n binary arrays with all ones connected only in a 1010-1111 pattern in any orientation.

%e Maximal 8 X 8 example

%e .1.1.0.1.0.0.1.1

%e .1.0.1.1.0.0.0.1

%e .1.1.0.1.0.0.1.1

%e .1.0.1.1.0.0.0.1

%e .0.1.0.0.1.0.1.0

%e .1.1.0.1.1.0.1.1

%e .0.1.0.0.1.0.1.0

%e .1.1.0.1.1.0.1.1

%K nonn

%O 1,4

%A _R. H. Hardin_