223637domain: NPropertiesPrimalityPrimeyesAppears in sequencesPrime-indexed primes q such that prime(q) + q + 1 is a prime-indexed prime.at n=37A318292Number of edges in the planar Farey Ring graph FR(n) defined in A359116, including the regions between the convex hull and the bounding circle.at n=10A359118Prime numbersat n=19913