13305601domain: NPropertiesPrimalityPrimeyesAppears in sequencesPrimes of the form (k! + 3)/3.at n=4A089131Greater prime factor of semiprimes in A089539.at n=10A089541a(n) = (n!+3)/3.at n=8A139150a(n) = prime(n)!/3 + 1.at n=3A139161Prime numbersat n=867826