OFFSET
1,1
LINKS
EXAMPLE
91 = 13*(13+1)/2 = 4^3 + 3^3, therefore 91 is a term.
MATHEMATICA
Sort[Select[Total/@Subsets[Range[300]^3, {2}], OddQ[Sqrt[8#+1]]&]] (* Harvey P. Dale, Oct 10 2014 *)
CROSSREFS
KEYWORD
nonn
AUTHOR
Reinhard Zumkeller, Jun 03 2006
STATUS
approved