211763domain: NAppears in sequencesGreatest product of two primes made up together of digits 0 to n once.at n=2A133149Squarefree numbers (A005117) with prime factors in a prime(k) + k progression.at n=16A232169Squarefree numbers (A005117) of form prime(k)*q where q = primes of the form prime(k) + k.at n=15A232170