Integers > 1 whose prime divisors are all Mersenne primes (i.e., of the form (2^p - 1)).

Terms

a(0) =3a(1) =7a(2) =9a(3) =21a(4) =27a(5) =31a(6) =49a(7) =63a(8) =81a(9) =93a(10) =127a(11) =147a(12) =189a(13) =217a(14) =243a(15) =279a(16) =343a(17) =381a(18) =441a(19) =567a(20) =651a(21) =729a(22) =837a(23) =889a(24) =961a(25) =1029a(26) =1143a(27) =1323a(28) =1519a(29) =1701