5044033domain: NAppears in sequencesStrong pseudoprimes (base 2) that become prime when two is subtracted.at n=18A230483Strong pseudoprimes k to base 2 such that either k-2 or k+2 is prime.at n=25A230487Fermat pseudoprimes (A001567) that are the sum of three consecutive primes.at n=23A270639