OFFSET
1,1
LINKS
EXAMPLE
153 = 17*(17+1)/2 = 5^3 + 3^3 + 1^3, therefore 153 is a term.
MATHEMATICA
Lim=20000; Tlim=Sqrt[2Lim]; Clim=Lim^(1/3); Select[Table[n(n+1)/2, {n, Tlim}], MemberQ[Total/@Tuples[Range[Clim]^3, 3], #]&] (* James C. McMahon, Sep 23 2024 *)
CROSSREFS
KEYWORD
nonn
AUTHOR
Reinhard Zumkeller, Jun 03 2006
EXTENSIONS
Two duplicated terms removed by Donovan Johnson, Apr 19 2011
STATUS
approved