Differences of two coprime 4th powers.

Terms

a(0) =0a(1) =15a(2) =65a(3) =80a(4) =175a(5) =255a(6) =369a(7) =544a(8) =609a(9) =624a(10) =671a(11) =1105a(12) =1295a(13) =1695a(14) =1776a(15) =2145a(16) =2320a(17) =2385a(18) =2400a(19) =2465a(20) =3439a(21) =3471a(22) =4015a(23) =4095a(24) =4160a(25) =4641a(26) =5936a(27) =6095a(28) =6305a(29) =6545