115520domain: NAppears in sequencesNumber of polycubes with n cells, allowing vertex connections and edge connections as well as face connections, distinguishing mirror images.at n=5A272385Number of 2-matchings of the n-th centered square grid graph.at n=11A344679Conductor of elliptic curve y^2 = x^3 - n*x - n.at n=37A387891