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A146902 Number of n X n binary arrays symmetric under horizontal reflection with all ones connected only in a 0010-1110-0111-0100 pattern in any orientation. 0

%I #4 Mar 31 2012 12:35:14

%S 1,1,1,1,1,1,1,1,21,33,169,271,1427,2719,19923,41145,1164335,2872687,

%T 96665317,273847235,9740767609,31500367345,1586820300667,

%U 5818312961823,565090352547181,2386581867483507,366376672212858833,1779376151775593621

%N Number of n X n binary arrays symmetric under horizontal reflection with all ones connected only in a 0010-1110-0111-0100 pattern in any orientation.

%e Maximal 9 X 9 example

%e .0.1.0.0.0.0.0.1.0

%e .0.1.1.1.0.1.1.1.0

%e .1.1.1.0.0.0.1.1.1

%e .0.0.1.0.0.0.1.0.0

%e .0.0.0.0.0.0.0.0.0

%e .0.1.0.0.0.0.0.1.0

%e .0.1.1.1.0.1.1.1.0

%e .1.1.1.0.0.0.1.1.1

%e .0.0.1.0.0.0.1.0.0

%K nonn

%O 1,9

%A _R. H. Hardin_, Nov 04 2008

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Last modified July 25 16:17 EDT 2024. Contains 374612 sequences. (Running on oeis4.)