A191352 Numbers n with property that 9*n is a sum of two distinct positive cubes.
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
Offset: 1
Keywords
Examples
9*n=a^3+b^3, {n,a,b}={{1,1,2},{8,2,4},{14,1,5},{21,4,5}...}.
Links
- Chai Wah Wu, Table of n, a(n) for n = 1..10224
Crossrefs
Cf. A024670 Numbers that are sums of 2 distinct positive cubes.
Programs
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Mathematica
Union[#/9&/@Select[Total/@(Subsets[Range[20],{2}]^3), Divisible[ #,9]&]] (* Harvey P. Dale, Jun 10 2011 *)
Extensions
Corrected by Harvey P. Dale, Jun 10 2011
Comments