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A193707
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Number of arrays of -5..5 integers x(1..n) with every x(i) in a subsequence of length 1, 2, 3 or 4 with sum zero
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1
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1, 11, 101, 1111, 6961, 52551, 396849, 2989013, 22245343, 166691719, 1248626317, 9348231385, 69979015481, 523959788091, 3922930719919, 29370668470793, 219896678916165, 1646364342879165, 12326287592918831, 92286557411926649
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OFFSET
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1,2
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COMMENTS
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Column 5 of A193710
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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
..3...-5....3....0...-3....2....4...-1....3...-2...-4....0...-4....2....0...-5
.-4....4...-4....2....5...-2....1....1...-3....2....4...-1....1...-2....1....5
.-2....1...-4...-2...-4...-3...-4....3....0....2...-3...-2....1....0...-1...-5
..3...-5....5....2....2....2...-1...-3...-4....2...-1....5....2....2....4....1
.-5....2....3...-4...-1....1...-1...-3....3....1....4...-2....2....0...-4....0
..2....2....0....2...-1....0....2....3....1...-5...-4...-3...-5...-2....4...-1
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CROSSREFS
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Sequence in context: A068166 A199306 A113978 * A006943 A073030 A209930
Adjacent sequences: A193704 A193705 A193706 * A193708 A193709 A193710
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KEYWORD
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nonn
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AUTHOR
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R. H. Hardin Aug 02 2011
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STATUS
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approved
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