178666domain: NAppears in sequencesTrajectory of 1 under map n->43n+1 if n odd, n->n/2 if n even.at n=34A033977((1/2)/p^2)*(T(p)-1) where p runs through the prime >= 5 and T(k) is the k-th central trinomial number (A002426).at n=5A087178Integers that are the arithmetic mean of 1000 consecutive primes.at n=22A123078