Numbers of the form (2^(p*q)-1) /((2^p-1)*(2^q-1)), where p>q are primes.
A140803
Numbers of the form (2^(p*q)-1) /((2^p-1)*(2^q-1)), where p>q are primes.
Terms
- a(0) =3a(1) =11a(2) =43a(3) =151a(4) =683a(5) =2359a(6) =2731a(7) =43691a(8) =174763a(9) =599479a(10) =2796203a(11) =8727391a(12) =9588151a(13) =178956971a(14) =715827883a(15) =2454285751a(16) =39268347319a(17) =45812984491a(18) =567767102431a(19) =733007751851
External references
- oeis: A140803