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%I #5 Mar 31 2012 12:36:34
%S 2,76,3904,344008,39898934,5870175231,996290832880,184906809944845,
%T 35956430134255744,7167834458473450500,1446698354699811336454,
%U 293844456856748839234741,59872951529043615795454004
%N Number of nX4 0..6 arrays with values 0..6 introduced in row major order and each element equal to at least one horizontal or vertical neighbor
%C Column 4 of A198654
%H R. H. Hardin, <a href="/A198651/b198651.txt">Table of n, a(n) for n = 1..28</a>
%e Some solutions with all values 0 to 6 for n=4
%e ..0..1..1..2....0..0..1..2....0..0..1..1....0..0..1..2....0..1..1..0
%e ..0..3..4..2....3..3..1..2....2..2..1..3....0..3..1..2....0..2..2..0
%e ..5..3..4..4....3..4..4..5....4..5..5..3....3..3..4..4....3..4..5..6
%e ..5..6..6..6....6..6..6..5....4..6..6..3....5..5..6..6....3..4..5..6
%K nonn
%O 1,1
%A _R. H. Hardin_ Oct 28 2011