A211745 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, three, four, five, six or seven distinct values for every i,j,k<=n

37, 199, 837, 3035, 10269, 32847, 102819, 313745, 947713, 2825647, 8369459, 24617169, 72044205, 210094481, 610184603, 1769811737, 5115685645, 14790124015, 42632437319, 123051586369, 354203684259, 1021785081697

Offset

1,1

Links

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

Example

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

Crossrefs

Sequence in context: A053872 A141954 A211734 * A211754 A211765 A221888

Adjacent sequences: A211742 A211743 A211744 * A211746 A211747 A211748

Keyword

nonn

Author

R. H. Hardin Apr 20 2012

Status

approved