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A146715 Number of n X n binary arrays symmetric under horizontal reflection with all ones connected only in a 1100-1111-1000 pattern in any orientation. 0

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

%S 1,1,1,1,1,1,17,21,589,1201,14115,35729,829417,2513431,171871447,

%T 646550497,84488290479,394701151631,87164416237779,501702351302759,

%U 183326230223443813,1292311484391232601

%N Number of n X n binary arrays symmetric under horizontal reflection with all ones connected only in a 1100-1111-1000 pattern in any orientation.

%e Maximal 8 X 8 example

%e .0.0.0.0.0.0.0.0

%e .0.0.0.0.0.0.0.0

%e .0.0.0.0.0.0.0.0

%e .0.0.0.0.0.0.0.0

%e .0.1.0.0.0.0.1.0

%e .0.1.0.0.0.0.1.0

%e .0.1.1.0.0.1.1.0

%e .1.1.1.0.0.1.1.1

%K nonn

%O 1,7

%A _R. H. Hardin_, Nov 04 2008

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Last modified April 16 04:38 EDT 2024. Contains 371696 sequences. (Running on oeis4.)