Divisors of 2^42 - 1.

Terms

a(0) =1a(1) =3a(2) =7a(3) =9a(4) =21a(5) =43a(6) =49a(7) =63a(8) =127a(9) =129a(10) =147a(11) =301a(12) =337a(13) =381a(14) =387a(15) =441a(16) =889a(17) =903a(18) =1011a(19) =1143a(20) =2107a(21) =2359a(22) =2667a(23) =2709a(24) =3033a(25) =5419a(26) =5461a(27) =6223a(28) =6321a(29) =7077