179992932domain: NAppears in sequencesNumbers k that divide the average of prime(k) and prime(k+1).at n=21A066706Numbers k such that k divides prime(k) + prime(k+1).at n=35A066895Numbers n such that prime(n) == -5 (mod n).at n=28A092047Numbers k such that prime(k+1) == 5 (mod k).at n=28A105329