15639936domain: NAppears in sequencesNumber of Eulerian cycles in the n X n torus grid graph.at n=3A297385Array read by antidiagonals: T(m,n) = number of Eulerian cycles in the torus grid graph C_m X C_n.at n=24A298117Number of Eulerian cycles in the graph C_4 X C_n.at n=3A298197