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

Author

R. H. Hardin Apr 23 2011

Keywords

• nonn

Comments

Row 4 of A189498

Examples

			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
		

Links

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