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

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

R. H. Hardin, Table of n, a(n) for n = 1..46

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

Adjacent sequences: A211738 A211739 A211740 * A211742 A211743 A211744

Keyword

nonn

Author

R. H. Hardin Apr 20 2012

Status

approved