A211581 Number of -2..2 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, five or six distinct values for every i,j,k<=n

25, 125, 457, 1353, 3771, 10123, 26785, 70815, 187485, 501357, 1349215, 3674445, 10074585, 27914969, 77778359, 218513889, 616455627, 1749899177, 4982262575, 14249870589, 40844847989, 117464523359, 338353979903, 977015700789

Offset

1,1

Links

R. H. Hardin, Table of n, a(n) for n = 1..33

Example

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

Crossrefs

Sequence in context: A062672 A036321 A289337 * A226231 A211595 A066609

Adjacent sequences: A211578 A211579 A211580 * A211582 A211583 A211584

Keyword

nonn

Author

R. H. Hardin Apr 16 2012

Status

approved