1115899domain: NPropertiesPrimalityPrimeyesAppears in sequencesNormalized total height of all rooted trees on n labeled nodes.at n=7A234953Primes p with f(p), f(f(p)), f(f(f(p))), f(f(f(f(p)))) all prime, where f(n) = prime(n) - n + 1.at n=29A235935Prime numbersat n=86889