46672291domain: NAppears in sequencesUnrestricted Perrin pseudoprimes.at n=6A013998Restricted Perrin pseudoprimes.at n=1A018187Odd composite numbers k for which k = A140607((k-1)/2).at n=27A140667Restricted Perrin pseudoprimes (Adams and Shanks definition).at n=1A275612Restricted Perrin pseudoprimes (Grantham definition).at n=1A275613