Woodall semiprimes: Semiprimes of the form n*2^n - 1.
A242115
Woodall semiprimes: Semiprimes of the form n*2^n - 1.
Terms
- a(0) =159a(1) =895a(2) =2047a(3) =4607a(4) =10239a(5) =49151a(6) =4718591a(7) =20971519a(8) =838860799a(9) =137438953471
External references
- oeis: A242115