Difference of two positive 6th powers.

Terms

a(0) =0a(1) =63a(2) =665a(3) =728a(4) =3367a(5) =4032a(6) =4095a(7) =11529a(8) =14896a(9) =15561a(10) =15624a(11) =31031a(12) =42560a(13) =45927a(14) =46592a(15) =46655a(16) =70993a(17) =102024a(18) =113553a(19) =116920a(20) =117585a(21) =117648a(22) =144495a(23) =215488a(24) =246519a(25) =258048a(26) =261415a(27) =262080a(28) =262143a(29) =269297