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A211750
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Number of -3..3 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, three, four, six or eight distinct values for every i,j,k<=n
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1
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48, 238, 990, 3764, 13830, 49722, 176928, 629352, 2235852, 8002034, 28683258, 103771062, 376062560, 1374796560, 5031081278, 18549468152, 68412809246, 253875030476, 941922579066, 3512298224194, 13090258692986, 48987088758646
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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...-3...-3...-3....2....1....0...-1....2....2...-3....1....2...-1...-2....1
..3....0....1....2...-3...-1...-3...-3....2....1....0....1....1...-2....1....2
.-2...-1...-3...-3...-2...-1....2....0....1....2....1...-1...-2...-3....2...-1
..1...-1....1....0....3...-1....3...-1....2....1....0....1....1....0....3...-2
.-2...-3...-3...-2....0....1....2...-1....1....2....1...-1....0...-1....2....3
..1...-2...-2....0...-3...-1....3...-3....1....0....0....1...-3....0....2...-2
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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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