A189493 Number of arrangements of n+1 nonzero numbers x(i) in -4..4 with the sum of floor(x(i)/x(i+1)) equal to zero

12, 78, 462, 3388, 24806, 182634, 1350418, 10077438, 75593372, 569975518, 4314566150, 32776245696, 249736590734, 1907787461862, 14606641601322, 112053156457254, 861099306196596, 6627602924590818, 51081646472620460

Offset

1,1

Comments

Column 4 of A189498

Links

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

Example

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

Crossrefs

Sequence in context: A022577 A321949 A227707 * A199492 A200055 A230520

Adjacent sequences: A189490 A189491 A189492 * A189494 A189495 A189496

Keyword

nonn

Author

R. H. Hardin Apr 23 2011

Status

approved