Semiprimes of the form 2^k - 1 or 2^k - 2.
A242832
Semiprimes of the form 2^k - 1 or 2^k - 2.
Terms
- a(0) =6a(1) =14a(2) =15a(3) =62a(4) =254a(5) =511a(6) =2047a(7) =16382a(8) =262142a(9) =1048574a(10) =8388607a(11) =4294967294a(12) =137438953471
External references
- oeis: A242832