92513domain: NAppears in sequencesNumbers n such that 5*10^n + 6*R_n - 3 is prime, where R_n = 11...1 is the repunit (A002275) of length n.at n=24A103017Antidiagonal sums of A068914.at n=23A334683Semiprimes k such that k+4, k+6, k+9, k+10 and k+14 are also semiprimes.at n=24A360666