87218domain: NAppears in sequencesa(n) = (sum of first n primes)^2 + sum of (squares of first n primes).at n=13A065762Semiprimes A001358(k) = p*q such that p*q+p+q and r*s+r+s are consecutive primes, where A001358(k+1)=r*s.at n=18A330478