267175domain: NAppears in sequencesWiener index of a benzenoid consisting of a double-step spiral chain of n hexagons (n>=2, s=21; see the Gutman et al. reference).at n=37A193397Numbers k such that 4*k + {1, 3, 7, 9, 13, 19} are all prime.at n=5A254288Numbers n such that 4n+1, 4n+3, 4n+7, 4n+9 and 4n+13 are prime.at n=22A254376