2373870domain: NAppears in sequencesNumber of spanning forests in 3 X n grid.at n=5A158450Array read by antidiagonals: T(m,n) is the number of acyclic spanning subgraphs in the grid graph P_m X P_n.at n=23A360194Array read by antidiagonals: T(m,n) is the number of acyclic spanning subgraphs in the grid graph P_m X P_n.at n=25A360194