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A183822 1/256 the number of (n+1)X4 0..3 arrays with no 2X2 subblock being a reflection across the shared element pair of any horizontal or vertical neighbor.

%I A183822 #6 Jul 22 2025 09:12:47
%S A183822 225,43947,8538066,1661285961,323115202755,62851591581012,
%T A183822 12225396762980829,2378005715920214025,462553489019014423650,
%U A183822 89972804578123532061801,17500904466916598194011543
%N A183822 1/256 the number of (n+1)X4 0..3 arrays with no 2X2 subblock being a reflection across the shared element pair of any horizontal or vertical neighbor.
%C A183822 Column 3 of A183827
%e A183822 Some solutions with upper left block zero for 3X4
%e A183822 ..0..0..2..1....0..0..2..3....0..0..3..3....0..0..2..0....0..0..3..0
%e A183822 ..0..0..0..0....0..0..3..2....0..0..3..0....0..0..1..3....0..0..3..2
%e A183822 ..2..3..1..0....3..1..0..1....2..1..2..3....3..3..2..2....0..3..0..3
%K A183822 nonn
%O A183822 1,1
%A A183822 _R. H. Hardin_ Jan 07 2011