291619domain: NPropertiesPrimalityPrimeyesAppears in sequencesDifference between sum of largest parts and sum of smallest parts of all partitions of n into an odd number of parts.at n=42A211870Primes p with pi(p), pi(pi(p)) and pi(p^2) all prime, where pi(.) is given by A000720.at n=25A237687Prime numbersat n=25357