460387domain: NPropertiesPrimalityPrimeyesAppears in sequencesPrimes p such that p+2^4, p+2^6, p+2^8, p+2^10 and p+2^12 are all primes.at n=18A269259Number of unlabeled semi-binary rooted trees with n nodes in which the non-leaf branches directly under any given node are all equal.at n=27A320271Prime numbersat n=38488