A190068 Number of arrangements of n+1 nonzero numbers x(i) in -6..6 with the sum of div(x(i),x(i+1)), where div(a,b)=a/b produces the integer quotient implying a nonnegative remainder, equal to zero

30, 233, 2276, 23400, 249119, 2783714, 31391655, 353856100, 4017545773, 45918810745, 526830982562, 6064138473938, 70033913982429, 811112118405079, 9415846493673903, 109526722276860886, 1276368965090149581

Offset

1,1

Comments

Column 6 of A190071

Links

R. H. Hardin, Table of n, a(n) for n = 1..125

Example

Some solutions for n=4
..4...-6....1...-3...-5...-1...-4...-2...-4...-5....2....4...-5....1....4....1
.-5....4...-5...-6....2....4...-4...-5....3...-5...-5...-3....3...-3...-5....3
.-4...-5...-5....5...-4...-2...-6....3....6....6....4...-5....6....3...-4....5
..6...-2....5....4...-5...-4....4....3....6....6....2....5....4....2....3....5
.-4....2...-6....5...-3...-2...-5...-4....6...-6...-6....4....3...-3...-5...-3

Crossrefs

Sequence in context: A291466 A246892 A246893 * A339750 A196412 A081779

Adjacent sequences: A190065 A190066 A190067 * A190069 A190070 A190071

Keyword

nonn

Author

R. H. Hardin May 04 2011

Status

approved