Divisors of 2^30 - 1.

Terms

a(0) =1a(1) =3a(2) =7a(3) =9a(4) =11a(5) =21a(6) =31a(7) =33a(8) =63a(9) =77a(10) =93a(11) =99a(12) =151a(13) =217a(14) =231a(15) =279a(16) =331a(17) =341a(18) =453a(19) =651a(20) =693a(21) =993a(22) =1023a(23) =1057a(24) =1359a(25) =1661a(26) =1953a(27) =2317a(28) =2387a(29) =2979