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A191352
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Numbers n with property that 9*n is a sum of two distinct positive cubes.
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4
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1, 8, 14, 21, 27, 39, 52, 57, 64, 84, 95, 105, 112, 125, 148, 155, 168, 186, 195, 216, 245, 258, 259, 273, 301, 305, 312, 343, 378, 392, 399, 416, 456, 469, 512, 546, 549, 553, 567, 584, 603, 651, 657, 672, 729, 760, 763, 776, 790, 819, 840, 889, 896
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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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9*n=a^3+b^3, {n,a,b}={{1,1,2},{8,2,4},{14,1,5},{21,4,5}...}.
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MATHEMATICA
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Union[#/9&/@Select[Total/@(Subsets[Range[20], {2}]^3), Divisible[ #, 9]&]] (* Harvey P. Dale, Jun 10 2011 *)
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CROSSREFS
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Cf. A024670 Numbers that are sums of 2 distinct positive cubes.
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KEYWORD
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nonn
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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