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A183940
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Number of strings of n numbers x(i) in -5..5 with sums of x(i) and of x(i)*x(i+1) both zero
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1
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1, 1, 11, 39, 497, 2343, 22881, 177535, 1682939, 14821961, 149400849, 1447662427, 14866001809, 149548074379, 1531694916059, 15535552043969, 159929685546853, 1644687110377919, 17107437074253385, 178041145616880947
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history;
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OFFSET
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1,3
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COMMENTS
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LINKS
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EXAMPLE
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Some solutions for n=4
.-4...-3...-2....4...-4....5...-1....0....1...-4....0...-1....0....2...-5...-3
..0....0....0...-1....0....0....0....2....2....1...-4...-2....5....0....0....0
..0....0....0...-2....4...-5....1....0....1....2....0...-1....0....0....5....3
..4....3....2...-1....0....0....0...-2...-4....1....4....4...-5...-2....0....0
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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STATUS
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approved
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