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%I #5 Mar 31 2012 12:37:31
%S 33,7653,11333893,114628150378,7804233177145593,
%T 3585439186083048636774,11099179467499737412764448230,
%U 231524919565338418309736640383814198
%N 1/4 the number of (n+1)X(n+1) 0..3 arrays with every 2X2 subblock having one or three distinct clockwise edge differences
%C Diagonal of A210077
%e Some solutions for n=4
%e ..2..3..1..1..2....2..0..1..2..1....2..1..1..2..1....1..1..3..2..3
%e ..1..1..1..1..3....0..0..1..3..3....1..1..2..2..3....0..1..1..1..1
%e ..2..3..1..1..1....2..0..2..2..1....0..0..2..1..1....2..1..2..3..1
%e ..1..1..1..2..2....1..0..1..1..1....0..2..2..0..1....1..1..1..1..1
%e ..3..1..3..3..1....2..2..1..0..0....0..2..2..1..1....0..2..0..0..0
%K nonn
%O 1,1
%A _R. H. Hardin_ Mar 17 2012
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