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A113958
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Triangular numbers that can be written as sum of two positive cubes.
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4
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28, 91, 351, 2926, 8001, 46971, 58653, 93528, 97461, 141778, 300700, 365085, 382375, 398278, 874503, 1295245, 1669878, 3425653, 4117015, 7517503, 7657741, 7771653, 9415630, 9598771
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OFFSET
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1,1
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COMMENTS
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LINKS
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EXAMPLE
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91 = 13*(13+1)/2 = 4^3 + 3^3, therefore 91 is a term.
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MATHEMATICA
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Sort[Select[Total/@Subsets[Range[300]^3, {2}], OddQ[Sqrt[8#+1]]&]] (* Harvey P. Dale, Oct 10 2014 *)
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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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