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%I #7 Apr 23 2021 10:44:17
%S 35577,864948,27630789,825828828,25618992453,764670893556,
%T 23817299324910,709372088422890,22102921087553340,658465356466048596,
%U 20513506300848143013,611133044545340195310,19039149809165434333251
%N Number of (n+1) X 6 0..2 arrays with the number of clockwise edge increases in every 2 X 2 subblock differing from each horizontal or vertical neighbor.
%C Column 5 of A205520.
%H R. H. Hardin, <a href="/A205517/b205517.txt">Table of n, a(n) for n = 1..210</a>
%e Some solutions for n=4
%e ..2..1..2..2..1..2....1..2..1..2..1..0....1..1..0..1..0..1....0..1..0..0..2..1
%e ..1..1..0..0..2..2....2..1..1..0..0..1....0..2..2..2..2..2....1..2..0..0..0..2
%e ..0..2..2..1..1..0....1..1..1..2..1..1....1..1..0..1..0..2....1..1..1..2..1..1
%e ..0..1..0..1..1..0....0..2..2..0..1..1....1..1..2..2..2..0....0..2..0..2..1..1
%e ..2..1..2..1..2..1....0..1..0..0..2..2....2..1..0..2..2..2....1..2..1..1..2..2
%Y Cf. A205520.
%K nonn
%O 1,1
%A _R. H. Hardin_ Jan 28 2012
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