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A147340 Number of n X n binary arrays symmetric under horizontal and vertical reflection with all ones connected only in a 0100-0100-1111-0010-0010 pattern in any orientation. 0

%I #4 Mar 31 2012 12:35:16

%S 1,1,1,1,1,1,1,1,1,1,9,9,25,25,57,57,341,341,3079,3079,34841,34841,

%T 488119,488119,8511553

%N Number of n X n binary arrays symmetric under horizontal and vertical reflection with all ones connected only in a 0100-0100-1111-0010-0010 pattern in any orientation.

%e Maximal 11 X 11 example

%e .0.0.1.0.0.0.0.0.1.0.0

%e .0.0.1.0.0.0.0.0.1.0.0

%e .1.1.1.1.0.0.0.1.1.1.1

%e .0.1.0.0.0.0.0.0.0.1.0

%e .0.1.0.0.0.0.0.0.0.1.0

%e .0.0.0.0.0.0.0.0.0.0.0

%e .0.1.0.0.0.0.0.0.0.1.0

%e .0.1.0.0.0.0.0.0.0.1.0

%e .1.1.1.1.0.0.0.1.1.1.1

%e .0.0.1.0.0.0.0.0.1.0.0

%e .0.0.1.0.0.0.0.0.1.0.0

%K nonn

%O 1,11

%A _R. H. Hardin_

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Last modified April 25 03:15 EDT 2024. Contains 371964 sequences. (Running on oeis4.)