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A189947 1/4 the number of arrangements of n+1 nonzero numbers x(i) in -5..5 with the sum of sign(x(i))*(|x(i)| mod x(i+1)) equal to zero 1
10, 39, 306, 3247, 31284, 280284, 2514945, 23257218, 219695998, 2090461716, 19931671853, 190527865384, 1828012347661, 17602780129116, 169999647974922, 1645503998030853, 15958170796668622, 155032669862412399 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 5 of A189951

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..189

EXAMPLE

Some solutions with n=3

..1...-2...-5....2...-5....4...-1...-2....3....2...-1...-2...-1....1....4...-4

..3....3....4...-2...-5...-4...-4...-1....1....4....3...-2...-4...-3...-3...-4

.-1...-5....1....1...-1...-4....1...-1....1...-3....1....1....1...-1...-1....2

.-3...-2....4....1...-1...-4....3....1...-1....4....4...-1...-4...-4....5...-2

CROSSREFS

Sequence in context: A055514 A055233 A267626 * A197705 A306413 A187205

Adjacent sequences:  A189944 A189945 A189946 * A189948 A189949 A189950

KEYWORD

nonn

AUTHOR

R. H. Hardin May 02 2011

STATUS

approved

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Last modified March 26 18:36 EDT 2019. Contains 321511 sequences. (Running on oeis4.)