129762001domain: NAppears in sequencesStrong pseudoprimes to bases 3 and 5.at n=26A215566Carmichael numbers all of whose prime factors are congruent to 3 modulo 4.at n=21A329468Carmichael numbers k for which the 2-adic valuation of phi(k) does not exceed the 2-adic valuation of k-1.at n=19A339818