Divisors of 2^28 - 1.

Terms

a(0) =1a(1) =3a(2) =5a(3) =15a(4) =29a(5) =43a(6) =87a(7) =113a(8) =127a(9) =129a(10) =145a(11) =215a(12) =339a(13) =381a(14) =435a(15) =565a(16) =635a(17) =645a(18) =1247a(19) =1695a(20) =1905a(21) =3277a(22) =3683a(23) =3741a(24) =4859a(25) =5461a(26) =6235a(27) =9831a(28) =11049a(29) =14351