A200176 Number of -3..3 arrays x(0..n-1) of n elements with zero sum and no two consecutive declines, no adjacent equal elements, and no element more than one greater than the previous (random base sawtooth pattern)

1, 3, 5, 11, 15, 29, 78, 160, 283, 574, 1428, 3087, 5800, 12563, 30105, 63994, 128826, 285423, 656667, 1407398, 2951141, 6564161, 14805297, 31974359, 68620812, 152674200, 340729396, 740843841, 1612122145, 3583332695, 7954071929

Offset

1,2

Comments

Column 3 of A200181

Links

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

Example

Some solutions for n=6
..1....3....1....3....1....1....2....3....2....1....2....3....0....0....1....0
..0...-2...-1....1...-1....2....3....2....1....2....0....1...-1...-2...-1....1
..1...-1....0....2....0....3...-2....3....2....3....1....2....0...-1....0....2
.-1....0....1...-3...-1...-2...-1...-3...-2...-3...-1...-2....1....0....1...-1
..0....1....2...-2....0...-1....0...-2...-1...-2....0...-1....2....1...-1....0
.-1...-1...-3...-1....1...-3...-2...-3...-2...-1...-2...-3...-2....2....0...-2

Crossrefs

Sequence in context: A102751 A032673 A164053 * A092929 A138879 A336136

Adjacent sequences: A200173 A200174 A200175 * A200177 A200178 A200179

Keyword

nonn

Author

R. H. Hardin Nov 13 2011

Status

approved