A146834 - OEIS

A146834

Number of n X n binary arrays symmetric about main diagonal with all ones connected only in a 1001-1111-0100 pattern in any orientation.

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

%S 1,1,1,1,1,5,17,41,159,789,4693,37959,362149,3798435,51198703,

%T 878343647,18110228679,463058495339,14563433819389,553118211838649,

%U 25843199757659397

%N Number of n X n binary arrays symmetric about main diagonal with all ones connected only in a 1001-1111-0100 pattern in any orientation.

%e Maximal 8 X 8 example

%e .0.0.1.0.0.1.0.0

%e .0.0.1.1.1.1.0.0

%e .1.1.0.1.0.0.1.1

%e .0.1.1.0.0.0.1.0

%e .0.1.0.0.0.1.1.0

%e .1.1.0.0.1.0.1.1

%e .0.0.1.1.1.1.0.0

%e .0.0.1.0.0.1.0.0

%K nonn

%O 1,6

%A _R. H. Hardin_, Nov 04 2008