A211759 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, six, seven or eight distinct values for every i,j,k<=n

36, 154, 600, 2160, 7520, 25300, 83944, 275424, 896780, 2930032, 9514764, 31283068, 102154068, 339451248, 1118239532, 3758067700, 12492423608, 42409118936, 142090246012, 486328578676, 1639690884804, 5647319658404, 19130793115084

Offset

1,1

Links

R. H. Hardin, Table of n, a(n) for n = 1..28

Example

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

Crossrefs

Sequence in context: A211748 A211757 A250633 * A064244 A280397 A064500

Adjacent sequences: A211756 A211757 A211758 * A211760 A211761 A211762

Keyword

nonn

Author

R. H. Hardin Apr 20 2012

Status

approved