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%I #3 Apr 20 2012 08:15:22
%S 49,343,1869,8659,35643,136121,494477,1736395,5955985,20088311,
%T 66948523,221182827,726211221,2373978133,7736949745,25168197671,
%U 81775419193
%N Number of -3..3 arrays x(i) of n+1 elements i=1..n+1 with set{t,u,v in 0,1}((x[i+t]+x[j+u]+x[k+v])*(-1)^(t+u+v)) having one, two, three, four, five, six or seven distinct values for every i,j,k<=n
%e Some solutions for n=5
%e .-1....3...-3...-1....0....2...-3....0...-1...-3...-1....1....3....1....2...-2
%e .-2...-1....0...-2....1...-2...-1....3....2....0...-1...-1...-1...-3....2....1
%e .-3....3...-3....1....0....1....3...-3....1...-2...-1...-3....3....3...-1....3
%e ..3....1...-1...-2....3...-1....0...-1....0....0....3....3...-1....0....1....1
%e ..1...-2....2....2...-3....3...-1....0....0...-3...-2....1....1....3...-3...-2
%e ..3...-1...-1...-1...-2...-2...-3...-1...-2....1....2....0....1....0....1....0
%K nonn
%O 1,1
%A _R. H. Hardin_ Apr 20 2012
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