Divisors of 2^12 - 1.

Terms

a(0) =1a(1) =3a(2) =5a(3) =7a(4) =9a(5) =13a(6) =15a(7) =21a(8) =35a(9) =39a(10) =45a(11) =63a(12) =65a(13) =91a(14) =105a(15) =117a(16) =195a(17) =273a(18) =315a(19) =455a(20) =585a(21) =819a(22) =1365a(23) =4095