246330domain: NAppears in sequencesNumber of 5k+4 primes (A030433) in range ]2^n,2^(n+1)].at n=23A095024Numbers taking exactly 21 steps to reach 15 in A086793.at n=20A119397Numbers k such that Euler phi(Dedekind psi(k)) > k.at n=19A196200