54400028domain: NAppears in sequencesNumber of primes <= 2^n.at n=30A007053Number of primes < 4^n.at n=15A086680Number of primes < 8^n.at n=10A086681Number of primes less than 2^n.at n=29A185192Numbers k such that bitwise AND of prime(k) and prime(k+1) = 1.at n=9A366550