208037domain: NPropertiesPrimalityPrimeyesAppears in sequencesMiddle of 3 consecutive prime numbers such that p1*p2*p3+d1+d2+1=average of twin prime pairs, d1(delta)=p2-p1,d2(delta)=p3-p2.at n=31A153407Smallest prime > n-th Catalan number.at n=11A173868Prime numbersat n=18638