First differences between numbers that are a difference between 2 positive cubes.

Terms

a(0) =7a(1) =12a(2) =7a(3) =11a(4) =19a(5) =5a(6) =2a(7) =28a(8) =7a(9) =19a(10) =7a(11) =3a(12) =25a(13) =17a(14) =20a(15) =19a(16) =7a(17) =2a(18) =1a(19) =53a(20) =8a(21) =17a(22) =20a(23) =15a(24) =4a(25) =7a(26) =44a(27) =1a(28) =10a(29) =51