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A146597 Number of n X n binary arrays symmetric about main diagonal with all ones connected only in a 1000-1000-1111 pattern in any orientation. 0

%I #4 Mar 31 2012 12:35:11

%S 1,1,1,1,3,7,19,51,237,1335,8829,68891,649429,7839465,116522409,

%T 2129542541,47609599737,1308687213295,44429361526611,1853713445956347

%N Number of n X n binary arrays symmetric about main diagonal with all ones connected only in a 1000-1000-1111 pattern in any orientation.

%e Maximal 8 X 8 example

%e .0.1.1.1.1.0.0.0

%e .1.0.0.0.1.0.0.0

%e .1.0.0.0.1.0.0.0

%e .1.0.0.0.0.1.1.1

%e .1.1.1.0.0.0.0.1

%e .0.0.0.1.0.0.0.1

%e .0.0.0.1.0.0.0.1

%e .0.0.0.1.1.1.1.0

%K nonn

%O 1,5

%A _R. H. Hardin_, Nov 04 2008

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Last modified April 19 17:38 EDT 2024. Contains 371797 sequences. (Running on oeis4.)