206601domain: NAppears in sequencesPseudoquadprimes: p+4 for primes p where p+4 divides p^(p+4) + 4 and p+4 is composite.at n=19A100875Sarrus numbers that become prime when two is added.at n=11A137198Pseudoprimes to a twin prime criterion of Aebi and Cairns.at n=12A224695