A211751 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 four, five, six or eight distinct values for every i,j,k<=n.

36, 170, 700, 2514, 8560, 27982, 89548, 285758, 904484, 2902906, 9275824, 30262878, 98205732, 326091006, 1073931604, 3619422754, 12061454552, 41110563674, 138187882940, 474813999142, 1605753547660, 5548416543766, 18842697824824

Offset

1,1

Links

R. H. Hardin, Table of n, a(n) for n = 1..41

Example

Some solutions for n=5
.-1...-3....1...-2....0...-3....1...-3...-2...-3...-3....3...-2....1...-1....2
..2...-2...-2...-3....2....0...-2...-1....3....0....1....2...-3...-3...-3....1
.-3...-3...-3...-1....3....1....3...-3....0....1...-3...-1....0....0....0....2
..0....2...-2...-3....2...-2....0...-1....1....2...-1....2...-1....3...-1....3
..3...-3....1....1....0....1...-3....0....2...-1...-3....0....0....0...-2....1
..1....0....0...-3....2....2...-1...-1....3....2...-1....3...-1...-1...-3....2

Crossrefs

Sequence in context: A166708 A211731 A211742 * A211762 A219858 A307958

Adjacent sequences: A211748 A211749 A211750 * A211752 A211753 A211754

Keyword

nonn

Author

R. H. Hardin, Apr 20 2012

Status

approved