A200179 Number of -6..6 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, 6, 7, 26, 48, 103, 246, 700, 1573, 3247, 8034, 21608, 50100, 109071, 268358, 690150, 1629202, 3709231, 9026969, 22707455, 54349757, 126747830, 308139152, 765740522, 1845805544, 4379391584, 10654557350, 26290537792, 63724232354, 152906665554

Offset

1,2

Comments

Column 6 of A200181

Links

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

Example

Some solutions for n=6
..5....0....4....3....3....6....2....3....2....1....4....4....3....2....0....4
..1....1....5....2....1...-2....0...-1....3....2....2....1....1....0....1...-1
..2....2....6....3....2...-1....1....0....4....3....3....2....2....1....2....0
.-2...-1...-6...-2...-3....0....0....1...-2...-2...-4...-1...-2....2....1....1
.-1....0...-5...-1...-2...-2....1....2...-1...-1...-3....0...-1...-3....2....2
.-5...-2...-4...-5...-1...-1...-4...-5...-6...-3...-2...-6...-3...-2...-6...-6

Crossrefs

Sequence in context: A219916 A135987 A259088 * A054289 A041078 A067229

Adjacent sequences: A200176 A200177 A200178 * A200180 A200181 A200182

Keyword

nonn

Author

R. H. Hardin Nov 13 2011

Status

approved