42702661domain: NAppears in sequencesTerms of A083737 which are not Carmichael numbers (A002997).at n=21A153580Pseudoprimes to bases 2,3,5 and 7 which are not Carmichael numbers (A002997).at n=5A153581Smallest weak pseudoprime to all natural bases up to prime(n) that is not a Carmichael number.at n=4A285549