2268795980domain: NAppears in sequencesNumber of bracelets (turn over necklaces) with n red, 1 pink and n-1 blue beads; also reversible strings with n red and n-1 blue beads; also next-to-central column in Losanitsch's triangle A034851.at n=17A005654Central column of Losanitsch's triangle A034851.at n=35A034872