A211729 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 or six distinct values for every i,j,k<=n

48, 230, 674, 1788, 4578, 11854, 30704, 81648, 217702, 595826, 1629412, 4562734, 12717112, 36221068, 102357152, 295195208, 842598926, 2452480406, 7051866394, 20665527346, 59743571278, 175966514172, 510748673328, 1510003478102

Offset

1,1

Links

R. H. Hardin, Table of n, a(n) for n = 1..57

Example

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

Crossrefs

Sequence in context: A235542 A269014 A265422 * A211738 A211749 A211758

Adjacent sequences: A211726 A211727 A211728 * A211730 A211731 A211732

Keyword

nonn

Author

R. H. Hardin Apr 20 2012

Status

approved