A211758 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 two, four, six, seven or eight distinct values for every i,j,k<=n

48, 230, 966, 3828, 14558, 54150, 197696, 716828, 2577250, 9274498, 33265006, 119874762, 431653980, 1564101296, 5669405566, 20684964244, 75518514030, 277412188326, 1019662031306, 3768412193514, 13932784344886, 51754946786278

Offset

1,1

Links

R. H. Hardin, Table of n, a(n) for n = 1..36

Example

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

Crossrefs

Sequence in context: A211729 A211738 A211749 * A211730 A211740 A211750

Adjacent sequences: A211755 A211756 A211757 * A211759 A211760 A211761

Keyword

nonn

Author

R. H. Hardin Apr 20 2012

Status

approved