A200174 Number of -1..1 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, 1, 3, 3, 2, 6, 10, 7, 12, 28, 29, 29, 70, 105, 96, 169, 327, 363, 449, 914, 1302, 1426, 2455, 4220, 5030, 6925, 12579, 17582, 21687, 36154, 57823, 73301, 106333, 179101, 250064, 332708, 538040, 825039, 1097810, 1630708, 2613839, 3676575, 5125886

Offset

1,3

Comments

Column 1 of A200181

Links

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

Example

All solutions for n=6
.-1...-1....1....0....1....1
..0....0...-1....1....0...-1
..1....1....0...-1....1....0
.-1....0...-1....0...-1....1
..0....1....0....1....0...-1
..1...-1....1...-1...-1....0

Crossrefs

Sequence in context: A374481 A147994 A106365 * A266153 A086636 A115055

Adjacent sequences: A200171 A200172 A200173 * A200175 A200176 A200177

Keyword

nonn

Author

R. H. Hardin Nov 13 2011

Status

approved