A211744 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 three, four, five, six or seven distinct values for every i,j,k<=n

36, 186, 760, 2676, 8688, 26700, 79680, 232312, 667992, 1901728, 5370088, 15113368, 42292140, 118400480, 329954824, 922231524, 2567058088, 7179940184, 20000771140, 56066665316, 156499989480, 440143385660

Offset

1,1

Links

Table of n, a(n) for n=1..22.

Example

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

Crossrefs

Sequence in context: A335219 A102949 A211733 * A211753 A211764 A255093

Adjacent sequences: A211741 A211742 A211743 * A211745 A211746 A211747

Keyword

nonn

Author

R. H. Hardin Apr 20 2012

Status

approved