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A200175 Number of -2..2 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, 2, 3, 6, 12, 15, 29, 72, 133, 214, 394, 853, 1782, 3087, 5597, 11777, 24069, 45200, 83805, 167284, 342971, 664695, 1257505, 2476990, 4999659, 9864713, 19023479, 37228518, 74480796, 147868410, 288747975, 565957525, 1124938149, 2237002991 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Column 2 of A200181

LINKS

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

EXAMPLE

All solutions for n=6

..1....2....1...-1....2....1...-2....0...-1....2....0....0....0....2....0

..0...-2...-1....0....1...-1...-1...-1....0....0....1....1...-2....0....1

..1...-1....0....1....2....0....0....0....1....1....2...-1...-1....1....2

.-1....0....1...-1...-2...-1....1....1....0...-2...-2....0....0...-1...-1

..0....1...-1....0...-1....0....2....2....1...-1...-1....1....1....0....0

.-1....0....0....1...-2....1....0...-2...-1....0....0...-1....2...-2...-2

CROSSREFS

Sequence in context: A070926 A226023 A124485 * A286906 A125867 A032727

Adjacent sequences:  A200172 A200173 A200174 * A200176 A200177 A200178

KEYWORD

nonn

AUTHOR

R. H. Hardin Nov 13 2011

STATUS

approved

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Last modified September 20 01:58 EDT 2019. Contains 327207 sequences. (Running on oeis4.)