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A211747 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, five, six or seven distinct values for every i,j,k<=n 0
49, 343, 1869, 8659, 35643, 136121, 494477, 1736395, 5955985, 20088311, 66948523, 221182827, 726211221, 2373978133, 7736949745, 25168197671, 81775419193 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..17.

EXAMPLE

Some solutions for n=5

.-1....3...-3...-1....0....2...-3....0...-1...-3...-1....1....3....1....2...-2

.-2...-1....0...-2....1...-2...-1....3....2....0...-1...-1...-1...-3....2....1

.-3....3...-3....1....0....1....3...-3....1...-2...-1...-3....3....3...-1....3

..3....1...-1...-2....3...-1....0...-1....0....0....3....3...-1....0....1....1

..1...-2....2....2...-3....3...-1....0....0...-3...-2....1....1....3...-3...-2

..3...-1...-1...-1...-2...-2...-3...-1...-2....1....2....0....1....0....1....0

CROSSREFS

Sequence in context: A036322 A036324 A211736 * A211756 A036323 A066429

Adjacent sequences:  A211744 A211745 A211746 * A211748 A211749 A211750

KEYWORD

nonn

AUTHOR

R. H. Hardin Apr 20 2012

STATUS

approved

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Last modified February 27 05:37 EST 2021. Contains 341649 sequences. (Running on oeis4.)