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A226359
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Number of ordered triples (i,j,k) with |i|, |j|, |k|, |i*j*k| <= n.
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11
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1, 27, 93, 183, 321, 459, 669, 855, 1121, 1379, 1685, 1967, 2393, 2723, 3125, 3551, 4049, 4475, 5045, 5519, 6137, 6707, 7301, 7871, 8681, 9323, 10013, 10735, 11545, 12259, 13189, 13951, 14881, 15739, 16621, 17527, 18673, 19579, 20557, 21559, 22753, 23755
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OFFSET
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0,2
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LINKS
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MATHEMATICA
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f[n_]:=Length[Complement[Union[Flatten[Table[If[Abs[i*j*k] <= n, {i, j, k}], {i, -n, n}, {j, -n, n}, {k, -n, n}], 2]], {Null}]]; Table[f[n], {n, 0, 100}]
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PROG
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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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