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A146236 Number of n X n binary arrays symmetric about both diagonal and antidiagonal with all ones connected only in a 110-111-001 pattern in any orientation. 0

%I

%S 1,1,1,1,1,1,1,9,17,33,89,333,849,5379,20923,147329,704405,5858399,

%T 36340527,403495741,3132269377,47135996775,474369570793,8861603100211,

%U 114644138972971

%N Number of n X n binary arrays symmetric about both diagonal and antidiagonal with all ones connected only in a 110-111-001 pattern in any orientation.

%e Maximal 8 X 8 example

%e .0.0.0.0.1.1.0.0

%e .0.0.0.0.1.1.0.0

%e .0.0.0.1.1.0.1.1

%e .0.0.1.0.0.1.1.1

%e .1.1.1.0.0.1.0.0

%e .1.1.0.1.1.0.0.0

%e .0.0.1.1.0.0.0.0

%e .0.0.1.1.0.0.0.0

%K nonn

%O 1,8

%A _R. H. Hardin_

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Last modified May 28 09:09 EDT 2022. Contains 354112 sequences. (Running on oeis4.)