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A211599
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Number of -2..2 arrays x(i) of n+1 elements i=1..n+1 with set{t,u,v in 0,1}((x[i+t]+x[j+u]+x[k+v])*(-1)^(t+u+v)) having two, four, five, six, seven or eight distinct values for every i,j,k<=n
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1
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24, 108, 398, 1378, 4458, 13916, 42036, 124830, 364224, 1054104, 3021982, 8631468, 24531936, 69625326, 197129902, 558033010, 1578078446, 4464721270, 12628681890, 35747573656, 101207342666, 286778663632, 812918632000, 2306299075524
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OFFSET
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1,1
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LINKS
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EXAMPLE
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Some solutions for n=5
..2...-2...-2...-1...-2...-1...-2....2...-1....0....1...-2....2....2....0....0
.-1...-2....1....1....2...-1...-1....1....2...-2...-2...-2...-1....0...-1...-1
..1....0...-1....2...-2....1...-2...-2....1...-2...-2...-2....2...-2....2...-2
..2...-1...-1...-1....0...-2...-2....1....0....0....1...-1....2...-1....2...-1
..2...-1...-1....1...-2...-1....1....2...-1...-1...-2....0....2...-2....1....2
.-1...-2...-1....2...-2...-2....2....2....0...-1....0...-2....2...-1....2...-1
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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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