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A183810 1/16 the number of (n+1)X9 binary arrays with no 2X2 subblock being a reflection across the shared element pair of any horizontal or vertical neighbor 0

%I #4 Mar 31 2012 12:35:54

%S 2187,79605,2518389,89998565,3023598287,106324742825,3645190453457,

%T 127200605449247,4393367308414597

%N 1/16 the number of (n+1)X9 binary arrays with no 2X2 subblock being a reflection across the shared element pair of any horizontal or vertical neighbor

%C Column 8 of A183811

%e Some solutions with upper left block zero for 3X9

%e ..0..0..0..1..1..0..0..0..1....0..0..0..0..1..1..1..1..1

%e ..0..0..1..1..0..1..1..0..0....0..0..1..1..1..0..0..1..1

%e ..1..1..1..0..1..1..1..1..0....0..1..1..0..0..1..0..0..0

%K nonn

%O 1,1

%A _R. H. Hardin_ Jan 07 2011

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Last modified April 13 22:20 EDT 2024. Contains 371646 sequences. (Running on oeis4.)