a(n) is the smallest k > 2^(2^n)+1 such that 2^(k-1) == 1 (mod (2^(2^n)-1)*k).
A307532
a(n) is the smallest k > 2^(2^n)+1 such that 2^(k-1) == 1 (mod (2^(2^n)-1)*k).
Terms
- a(0) =5a(1) =7a(2) =29a(3) =281a(4) =65617a(5) =4294967681
External references
- oeis: A307532