243437domain: NPropertiesPrimalityPrimeyesAppears in sequencesNumber of positive integers <= 2^n of form x^2 + 19 y^2.at n=21A054232Least prime p such that 3 + 4*prime(p*n) = 5*prime(q*n) for some prime q.at n=34A260886Numbers of terms of 1+A081411 that are divisible by prime(n).at n=29A390831Prime numbersat n=21501