191747domain: NPropertiesPrimalityPrimeyesAppears in sequencesA simple grammar.at n=8A052751Primes of the form n^3-n^2-1.at n=16A162291Array read by antidiagonals: T(n,k) is the number of unlabeled oriented edge-rooted k-gonal 2-trees with n oriented polygons, n >= 0, k >= 2.at n=63A340814Prime numbersat n=17307