Divisors of 10^12 - 1.

Terms

a(0) =1a(1) =3a(2) =7a(3) =9a(4) =11a(5) =13a(6) =21a(7) =27a(8) =33a(9) =37a(10) =39a(11) =63a(12) =77a(13) =91a(14) =99a(15) =101a(16) =111a(17) =117a(18) =143a(19) =189a(20) =231a(21) =259a(22) =273a(23) =297a(24) =303a(25) =333a(26) =351a(27) =407a(28) =429a(29) =481