A200177 Number of -4..4 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, 4, 5, 14, 24, 48, 100, 280, 608, 1094, 2558, 6656, 14475, 29638, 69174, 170043, 384938, 830598, 1910747, 4608078, 10600467, 23514477, 54265809, 129118292, 298774740, 676277578, 1564120363, 3687870415, 8572421420, 19643806169

Offset

1,2

Comments

Column 4 of A200181

Links

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

Example

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

Crossrefs

Sequence in context: A306897 A348889 A006904 * A241863 A350527 A316415

Adjacent sequences: A200174 A200175 A200176 * A200178 A200179 A200180

Keyword

nonn

Author

R. H. Hardin Nov 13 2011

Status

approved