45549domain: NAppears in sequencesCount of the first 10^n primes which do not contain the digit 7.at n=5A228419Numbers k such that k^3 - b2 is a triangular number (A000217), where b2 is the largest square less than k^3.at n=40A233401Numbers N such that N + the sum of the cubes of its digits is again a third power.at n=30A362953