Positive numbers l of the form l=A007913(k^4-4*k*m^3), where 1<=k<=5*l, 1<=|m|<=5*l.
2, 5, 6, 11, 15, 17, 29, 33, 41, 42, 43, 51, 53, 58, 62, 65, 69, 82, 85, 86, 89, 9
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Sat Aug 28 20:31:02 CEST 2010 [seqfan] Solvability of equation x^3+y^3+z^3=0 in integers of real and imaginary quadratic fields