10460353199domain: NAppears in sequencesLargest prime <= 3^n.at n=20A104088Least prime of the form x^n-x-1.at n=19A126439Primes of the form 3^k - 4.at n=3A156555a(n) = 3^n - 4.at n=21A168611Closest prime to 3^n (in case of a tie, choose the smaller prime).at n=20A186732