2077545domain: NAppears in sequencesIncreasing gaps between 2-pseudoprimes (upper end).at n=20A175737Fermat pseudoprimes to base 2 divisible by 15.at n=14A216364Fermat pseudoprimes to base 2 that can be written as p^2*n - p*n + p, where p is also a Fermat pseudoprime to base 2 and n is a positive integer.at n=4A217835