a(n) = least k such that 2^i*k+1 is prime for 1<=i<=n.
A124417
a(n) = least k such that 2^i*k+1 is prime for 1<=i<=n.
Terms
- a(0) =1a(1) =1a(2) =9a(3) =765a(4) =765a(5) =8325a(6) =8325a(7) =7757430a(8) =428547690a(9) =102764221560a(10) =694561346985
External references
- oeis: A124417