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A211741
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, six or seven distinct values for every i,j,k<=n
1
49, 239, 815, 2425, 6901, 19179, 52773, 145469, 400713, 1115601, 3110323, 8788819, 24852989, 71239929, 204020245, 591763945, 1711883257, 5010260001, 14603694017, 43023663753, 126092893931, 373234182183, 1098179433481, 3261494794727
OFFSET
1,1
LINKS
EXAMPLE
Some solutions for n=5
.-3...-3....3...-1...-1....3...-3....3....0...-1....0...-1...-1...-1....2...-2
.-3....2....1...-2...-2....0....0...-2....1...-3...-1...-2....3...-1...-3...-1
.-3...-3...-2....1....3...-1....3....3....2...-2....0...-3...-1...-1....1...-2
.-1...-1....1....2....3....0....0....3....1....0...-2...-1...-1...-1...-3....0
.-3....1...-2...-1....3....3...-3...-2....2...-1...-1...-2....3....0....2...-1
.-3...-1....1...-2....3....0....2...-2....2...-3....0...-3....3...-1...-1...-3
CROSSREFS
Sequence in context: A137880 A264538 A266799 * A211761 A373707 A373680
KEYWORD
nonn
AUTHOR
R. H. Hardin Apr 20 2012
STATUS
approved