159097domain: NPropertiesPrimalityPrimeyesAppears in sequencesNumerator of Sum[ Prime[k]^2, {k,1,n}] / Product[ Prime[k], {k,1,n}] = Numerator[ A024450[n] / A002110[n] ].at n=38A122136Primes from A122136 corresponding to the indices A122138.at n=20A122139Numerator of the contraharmonic mean of the first n primes.at n=38A296199Prime numbersat n=14605