A189501 Number of arrangements of 5 nonzero numbers x(i) in -n..n with the sum of floor(x(i)/x(i+1)) equal to zero

12, 136, 928, 3388, 9394, 22088, 45892, 86416, 152136, 251964, 400562, 608572, 895302, 1288110, 1800136, 2460254, 3306706, 4375254, 5709802, 7332744, 9299616, 11690792, 14567750, 17952362, 21909788, 26581910, 32027018, 38302012, 45552824

Offset

1,1

Comments

Row 4 of A189498

Links

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

Example

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

Crossrefs

Sequence in context: A290474 A030023 A194013 * A373107 A351514 A216081

Adjacent sequences: A189498 A189499 A189500 * A189502 A189503 A189504

Keyword

nonn

Author

R. H. Hardin Apr 23 2011

Status

approved