7930117domain: NAppears in sequencesQuasi-Carmichael numbers to base -8: squarefree composites n such that prime p|n ==> p+8|n+8.at n=11A029568Composite squarefree numbers n such that p+d(n) divides n+d(n), where p are the prime factors of n and d(n) the number of divisors of n.at n=13A228299