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A189499 Number of arrangements of 3 nonzero numbers x(i) in -n..n with the sum of floor(x(i)/x(i+1)) equal to zero 1
4, 12, 38, 78, 148, 240, 380, 554, 788, 1062, 1410, 1806, 2294, 2844, 3498, 4226, 5068, 5988, 7040, 8180, 9466, 10850, 12396, 14046, 15876, 17824, 19960, 22226, 24696, 27296, 30118, 33090, 36288, 39642, 43242, 47002, 51022, 55220, 59690, 64346, 69294 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Row 2 of A189498

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..200

EXAMPLE

Some solutions for n=5

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

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

.-5....3...-3....3....5...-5....5...-5...-3...-4...-4....4...-4...-4...-4....4

CROSSREFS

Sequence in context: A149322 A149323 A024590 * A183159 A289809 A014345

Adjacent sequences:  A189496 A189497 A189498 * A189500 A189501 A189502

KEYWORD

nonn

AUTHOR

R. H. Hardin Apr 23 2011

STATUS

approved

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Last modified January 20 09:50 EST 2022. Contains 350471 sequences. (Running on oeis4.)