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%I #9 Jan 18 2018 09:51:28
%S 256,1060,5136,32920,118936,484704,3270240,11893600,48470400,
%T 327024000,1189360000,4847040000,32702400000,118936000000,
%U 484704000000,3270240000000,11893600000000,48470400000000,327024000000000
%N Number of (n+1) X (n+1) 0..3 arrays with every 2 X 3 or 3 X 2 subblock having exactly one clockwise edge increases.
%C Diagonal of A206206.
%F Conjectures from _Colin Barker_, Jan 18 2018: (Start)
%F G.f.: 4*x*(64 + 265*x + 1284*x^2 + 1830*x^3 + 3234*x^4 - 7224*x^5 - 5440*x^6) / (1 - 100*x^3).
%F a(n) = 100*a(n-3) for n>7.
%F (End)
%e Some solutions for n=4
%e ..3..3..2..0..0....2..3..3..2..2....2..2..2..1..0....0..1..1..2..2
%e ..3..3..3..0..0....2..3..3..3..1....3..2..2..2..0....0..1..1..1..2
%e ..0..3..3..3..0....2..2..3..3..3....1..1..2..2..2....0..0..1..1..1
%e ..0..0..3..3..3....2..2..2..3..3....1..1..1..2..2....0..0..0..1..1
%e ..0..0..0..3..3....1..2..2..2..2....2..1..1..1..1....1..0..0..0..0
%K nonn
%O 1,1
%A _R. H. Hardin_ Feb 04 2012
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