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A147015 Number of n X n binary arrays symmetric about both diagonal and antidiagonal with all ones connected only in a 01000-11111-00010 pattern in any orientation. 0

%I

%S 1,1,1,1,1,1,1,1,3,5,11,17,29,49,193,509,1945,5173,19089,57135,304805,

%T 1236463,7710953,34938029,239632727,1249524805,10579289505,68493745825

%N Number of n X n binary arrays symmetric about both diagonal and antidiagonal with all ones connected only in a 01000-11111-00010 pattern in any orientation.

%e Maximal 9 X 9 example

%e .0.0.0.0.0.1.0.0.0

%e .0.0.1.1.1.1.1.0.0

%e .0.1.0.1.0.0.0.1.0

%e .0.1.1.0.0.0.0.1.1

%e .0.1.0.0.0.0.0.1.0

%e .1.1.0.0.0.0.1.1.0

%e .0.1.0.0.0.1.0.1.0

%e .0.0.1.1.1.1.1.0.0

%e .0.0.0.1.0.0.0.0.0

%K nonn

%O 1,9

%A _R. H. Hardin_, Nov 04 2008

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Last modified June 18 02:14 EDT 2013. Contains 226327 sequences.