49913domain: NAppears in sequencesComposite squarefree numbers n such that p(i)-7 divides n+7, where p(i) are the prime factors of n.at n=23A225707Numbers k such that (7*10^k + 71)/3 is prime.at n=35A270831Numbers k such that k and k + 1 have the same norm of the sum of unitary divisors in Gaussian integers (A332474).at n=7A332475