731957domain: NPropertiesPrimalityPrimeyesAppears in sequencesLargest prime dividing Sum_{k=0..n} k! * (n-k)!.at n=19A049413Numerators of b(n) = b(n-1)/2 + 1/(2*n), b(0)=0.at n=21A242376The slowest increasing sequence of primes such that no three terms sum up to a prime number.at n=23A254925Prime numbersat n=58932