Numbers of the form 2^k + k + 1 that are the product of two distinct primes.
A176071
Numbers of the form 2^k + k + 1 that are the product of two distinct primes.
Terms
- a(0) =21a(1) =38a(2) =265a(3) =4109a(4) =65553a(5) =262163a(6) =1048597a(7) =67108891a(8) =274877906983
External references
- oeis: A176071