Differences between two positive cubes in exactly 4 ways.

Terms

a(0) =4118877a(1) =32951016a(2) =52324993a(3) =94287375a(4) =111209679a(5) =214435711a(6) =263608128a(7) =418599944a(8) =442245349a(9) =514859625a(10) =754299000a(11) =889677432a(12) =995635368a(13) =1080305856a(14) =1147627000a(15) =1715485688a(16) =2108865024a(17) =2545759125a(18) =3002661333a(19) =3348799552a(20) =3537962792a(21) =3701994688a(22) =4118877000a(23) =4304670552