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A184055
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Number of strings of n+2 numbers x(i) in -3..3 with the sum of x(i) equal to zero and the sums of x(i)*x(i+1) and x(i)*x(i+2) equal to each other.
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0
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1, 11, 65, 243, 1731, 11251, 67083, 426379, 2719451, 17387313, 109704933, 710799097, 4675624993, 30453086763, 201255272997, 1329877798651, 8809229432607, 58426744937709, 388472975094601, 2592082676376493
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OFFSET
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1,2
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COMMENTS
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LINKS
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EXAMPLE
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Some solutions for n=4
.-2....1....1....0....3....3....3....0....1....1...-2...-3...-2....2...-2...-2
..0....2....0...-2....0...-2...-1...-1....0....2....2....0....1....1...-3....0
..0...-2...-2....0....0...-3....3....2....1...-1....1....0....0...-1....0....0
..0...-1....2....0...-3....3....0...-3...-1....1....0....0...-1....1....3....2
..2....2....0....2....0...-1...-3...-1...-1...-1...-2....0....1...-2...-1....0
..0...-2...-1....0....0....0...-2....3....0...-2....1....3....1...-1....3....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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