12173703001domain: NAppears in sequencesCarmichael numbers of the form (60k+41)*(90k+61)*(150k+101), where 60k+41, 90k+61 and 150k+101 are all primes.at n=5A255441a(1) = 561; a(n+1) = smallest Fermat pseudoprime to all natural bases up to lpf(a(n)).at n=24A300629Records in A083876.at n=24A348258