Numbers that are divisible by 6 (and 18) and are differences between two cubes in at least one way.

Terms

a(0) =342a(1) =504a(2) =702a(3) =936a(4) =1206a(5) =1512a(6) =1854a(7) =2196a(8) =2232a(9) =2646a(10) =2736a(11) =3096a(12) =3348a(13) =3582a(14) =4032a(15) =4104a(16) =4662a(17) =4788a(18) =5256a(19) =5616a(20) =5886a(21) =6516a(22) =6552a(23) =6858a(24) =7254a(25) =7488a(26) =7992a(27) =8532a(28) =8766a(29) =9234