A147046 - OEIS

A147046

Number of n X n binary arrays symmetric about main diagonal with all ones connected only in a 0100-1100-0111-0010 pattern in any orientation.

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

%S 1,1,1,3,5,13,29,101,469,2569,14457,96029,884501,9747473,128659273,

%T 1994890829,37888899645,865586757513,24269607911697,821230507381717,

%U 33773516260252773,1665299606145236705,99884037640157459321

%N Number of n X n binary arrays symmetric about main diagonal with all ones connected only in a 0100-1100-0111-0010 pattern in any orientation.

%e Maximal 8 X 8 example

%e .0.0.1.0.0.0.1.0

%e .0.0.1.1.0.0.1.1

%e .1.1.1.0.1.1.1.0

%e .0.1.0.0.0.1.0.0

%e .0.0.1.0.0.0.1.0

%e .0.0.1.1.0.1.1.1

%e .1.1.1.0.1.1.0.0

%e .0.1.0.0.0.1.0.0

%K nonn

%O 1,4

%A _R. H. Hardin_, Nov 04 2008