114226domain: NAppears in sequencesNumbers k such that 2*P(k) + 3, 2*P(k+1) + 5, 2*P(k+2) + 7, 2*P(k+3) + 9 are also consecutive primes where P(i) = i-th prime.at n=2A103873Numbers k such that R_(k+2) + 5*10^k is prime, where R_k = 11...1 is the repunit (A002275) of length k.at n=11A256931