34837domain: NAppears in sequencesIndices of primes in sequence defined by A(0) = 97, A(n) = 10*A(n-1) - 63 for n > 0.at n=27A100998a(1) = 2; a(n) is twice the previous term if it is prime, otherwise the previous term minus its lowest prime factor plus one.at n=42A180625Numbers n such that n*2^2281 - 1 is prime.at n=36A265504