a(n) = least k such that 2^i*k-1 is prime for 1<=i<=n.
A124516
a(n) = least k such that 2^i*k-1 is prime for 1<=i<=n.
Terms
- a(0) =2a(1) =2a(2) =3a(3) =3a(4) =45a(5) =45a(6) =561330a(7) =9549960a(8) =42932385a(9) =13044904290a(10) =277344139215a(11) =277344139215
External references
- oeis: A124516