231431domain: NPropertiesPrimalityPrimeyesAppears in sequencesLargest prime factor of A023199(n).at n=20A108402Sum over all partitions lambda of n into 4 distinct parts of Product_{i:lambda} prime(i).at n=12A258359Number of twin self-primes <= 10^n.at n=9A382457Prime numbersat n=20553