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A200427
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Number of -5..5 arrays x(0..n+2) of n+3 elements with zero sum and no two or three adjacent elements summing to zero
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1
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520, 4750, 36952, 293464, 2591502, 23380862, 210222830, 1882624856, 16911040968, 152565274262, 1381204433968, 12534862082614, 113983746333928, 1038347313892636, 9474508237939826, 86579678278534962, 792234931151418444
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OFFSET
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1,1
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COMMENTS
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Column 5 of A200430
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LINKS
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R. H. Hardin, Table of n, a(n) for n = 1..130
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EXAMPLE
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Some solutions for n=3
.-1....0...-1...-1....0...-4....2....2....2....4....5....4...-2...-3...-1...-1
..3....5....4...-2....1...-4...-3...-3....0....2....0...-3...-5....1...-3....3
..2....3....4....1....4....2...-3...-1....2....0....2...-3...-3....3....5....5
..2...-2....0....3...-3....5....0...-1...-3...-4...-4....5....2....0....2....0
.-3...-2...-3...-1...-2....5....5....4....0...-3...-3....1....5....2...-1...-3
.-3...-4...-4....0....0...-4...-1...-1...-1....1....0...-4....3...-3...-2...-4
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CROSSREFS
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Sequence in context: A147856 A094903 A250693 * A250678 A178269 A351324
Adjacent sequences: A200424 A200425 A200426 * A200428 A200429 A200430
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KEYWORD
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nonn
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AUTHOR
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R. H. Hardin Nov 17 2011
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STATUS
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approved
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