A147070 - OEIS

A147070

Number of n X n binary arrays symmetric about main diagonal with all ones connected only in a 10000-11111-00001 pattern in any orientation.

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

%S 1,1,1,1,1,1,3,9,19,61,211,741,3813,22505,147447,1175399,10583799,

%T 109540847,1364336983,19785643957,336137809321,6744593577357,

%U 157257981066897

%N Number of n X n binary arrays symmetric about main diagonal with all ones connected only in a 10000-11111-00001 pattern in any orientation.

%e Maximal 8 X 8 example

%e .0.0.0.0.1.1.0.0

%e .0.0.0.0.0.1.0.0

%e .1.0.0.0.0.1.1.0

%e .1.1.1.1.1.0.0.0

%e .0.0.0.0.1.0.0.0

%e .0.0.0.0.0.0.0.0

%K nonn

%O 1,7

%A _R. H. Hardin_, Nov 04 2008