login
A188361
Number of arrangements of 6 numbers x(i) in -n..n with the sum of x(i)*x(i+1) equal to zero
0
197, 1953, 7369, 22229, 45801, 100885, 163745, 283893, 438373, 678617, 911709, 1386673, 1772141, 2399001, 3175561, 4167365, 5010369, 6549541, 7719713, 9789981, 11867065, 14232893, 16279425, 20224801
OFFSET
1,1
COMMENTS
Row 5 of A188358
EXAMPLE
Some solutions for n=4
..0...-2...-2....4....2...-3...-2....3...-4....1....1...-4....4....2....2....3
.-3...-1...-3...-2....0...-2...-3...-1....2....0...-1....1....1....3....0....3
.-3....0....2....2...-2...-3....3....1...-1...-3....1...-1....4...-1....0...-3
..2...-3....2....4...-3....4....4....4...-1....3....0...-3...-2....1...-1....2
.-1....1...-2....4....2....4...-3....0....3....3...-1....2...-4...-1....0....2
..1....1....0...-3....0...-4...-1....2....4....0...-2....4....2....1....0....1
CROSSREFS
Sequence in context: A031706 A201256 A231462 * A329107 A097733 A114050
KEYWORD
nonn
AUTHOR
R. H. Hardin Mar 28 2011
STATUS
approved