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A190070 Number of arrangements of n+1 nonzero numbers x(i) in -8..8 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 1
56, 536, 6946, 92478, 1291797, 18951546, 282859251, 4232955454, 63898862902, 972408511316, 14859125421285, 227805216299376, 3504714306481893, 54079878634478640, 836480995724826396, 12965711458798193610 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 8 of A190071

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..76

EXAMPLE

Some solutions for n=4

..7....8....8....5...-3...-6...-2...-2...-7....2....3...-7...-8....5....8...-3

..6....3....2....8...-8....4...-3....6....8...-5...-7...-6....8....2....8....5

.-2....5...-4....8....6....3....6...-8....8...-3....3....8....8...-6...-4...-3

.-3...-8....1...-4....5....3....6....7....5....5....1....5....7....4....6...-4

.-6....7...-8...-7....8....6...-4....2...-4...-3...-7...-2...-7...-6....3...-6

CROSSREFS

Sequence in context: A219943 A204832 A190536 * A220930 A220209 A276565

Adjacent sequences:  A190067 A190068 A190069 * A190071 A190072 A190073

KEYWORD

nonn

AUTHOR

R. H. Hardin May 04 2011

STATUS

approved

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Last modified November 24 20:34 EST 2020. Contains 338616 sequences. (Running on oeis4.)