A211764 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, seven or eight distinct values for every i,j,k<=n

36, 186, 944, 4764, 23824, 118360, 584192, 2867280, 14000960, 68054336, 329428048, 1588714080, 7636061184, 36590420768, 174849450144, 833428507648, 3963494947280, 18809675141312, 89095618484832, 421283134048224

Offset

1,1

Links

R. H. Hardin, Table of n, a(n) for n = 1..32

Example

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

Crossrefs

Sequence in context: A211733 A211744 A211753 * A255093 A017138 A339981

Adjacent sequences: A211761 A211762 A211763 * A211765 A211766 A211767

Keyword

nonn

Author

R. H. Hardin Apr 20 2012

Status

approved