OFFSET
1,1
MATHEMATICA
a = {}; Do[Do[w = 3x y^2 + x^3; If[(w > 0) && w < 3000, AppendTo[a, w]], {x, 1, 1000}], {y, 1, 1000}]; Union[a]
CROSSREFS
KEYWORD
nonn
AUTHOR
Artur Jasinski, Nov 29 2007
STATUS
approved