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A147079 Number of n X n binary arrays symmetric about both diagonal and antidiagonal with all ones connected only in a 10000-11111-10000 pattern in any orientation. 0

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

%S 1,1,1,1,1,1,1,1,1,3,6,11,18,29,61,169,515,1567,4591,14997,48832,

%T 200369,837466,4124094,19846005,109320099,602369436

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

%e Maximal 10 X 10 example

%e .0.0.0.0.0.0.1.0.0.0

%e .0.0.1.1.1.1.1.0.0.0

%e .0.1.0.0.0.0.1.0.0.0

%e .0.1.0.0.0.0.0.1.1.1

%e .0.1.0.0.0.0.0.0.1.0

%e .0.1.0.0.0.0.0.0.1.0

%e .1.1.1.0.0.0.0.0.1.0

%e .0.0.0.1.0.0.0.0.1.0

%e .0.0.0.1.1.1.1.1.0.0

%e .0.0.0.1.0.0.0.0.0.0

%K nonn

%O 1,10

%A _R. H. Hardin_, Nov 04 2008

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Last modified April 16 05:35 EDT 2024. Contains 371697 sequences. (Running on oeis4.)