258887domain: NPropertiesPrimalityPrimeyesAppears in sequencesTriangle read by rows: T(n,k) is the number of inequivalent colorings of lone-child-avoiding rooted trees with n colored leaves using exactly k colors.at n=52A339645Primes p such that p^9 - 1 has 16 divisors.at n=11A342065Prime numbersat n=22752