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A200176
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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)
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1
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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
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OFFSET
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1,2
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COMMENTS
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Column 3 of A200181
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LINKS
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R. H. Hardin, Table of n, a(n) for n = 1..200
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EXAMPLE
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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
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CROSSREFS
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Sequence in context: A102751 A032673 A164053 * A092929 A138879 A336136
Adjacent sequences: A200173 A200174 A200175 * A200177 A200178 A200179
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KEYWORD
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nonn
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AUTHOR
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R. H. Hardin Nov 13 2011
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STATUS
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approved
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