A211591 Number of -2..2 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, five, six or eight distinct values for every i,j,k<=n

24, 108, 342, 986, 2600, 6776, 17064, 43310, 108434, 274934, 693672, 1773284, 4527672, 11702070, 30251214, 79047138, 206675020, 545332484, 1439676080, 3829694670, 10190585358, 27284478782, 73058107616, 196594473356

Offset

1,1

Links

R. H. Hardin, Table of n, a(n) for n = 1..55

Example

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

Crossrefs

Sequence in context: A187163 A211577 A101862 * A211585 A211599 A282211

Adjacent sequences: A211588 A211589 A211590 * A211592 A211593 A211594

Keyword

nonn

Author

R. H. Hardin Apr 16 2012

Status

approved