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%I #6 Apr 26 2021 21:13:31
%S 40,99933,87054174,95752776009,96951738076992,101554003879403823
%N 1/4 the number of n X 7 0..3 arrays with every element equal to exactly one or two of its horizontal and vertical neighbors.
%C Column 7 of A186168.
%e Some solutions for 4 X 7 with a(1,1) = 0
%e ..0..0..2..0..0..0..1....0..0..2..0..0..3..0....0..0..2..0..0..0..0
%e ..0..0..2..0..2..2..1....0..0..2..0..3..3..0....0..0..2..0..2..2..1
%e ..2..2..0..2..3..3..1....2..2..0..2..3..0..1....2..2..0..1..2..1..1
%e ..0..0..0..2..3..2..2....0..0..0..2..0..0..1....0..0..0..1..1..3..3
%Y Cf. A186168.
%K nonn
%O 1,1
%A _R. H. Hardin_ Feb 13 2011
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