678077domain: NPropertiesPrimalityPrimeyesAppears in sequencesPrimes p such that A008472(p-1) = A008472(p+1) and is a prime.at n=6A190722Primes p such that A008472(p-1) = A008472(p+1), where A008472 = sum of distinct primes dividing n.at n=23A203182Prime numbersat n=54903