1816344222domain: NAppears in sequencesNumber of spanning forests in 3 X n grid.at n=7A158450Array read by antidiagonals: T(m,n) is the number of acyclic spanning subgraphs in the grid graph P_m X P_n.at n=38A360194Array read by antidiagonals: T(m,n) is the number of acyclic spanning subgraphs in the grid graph P_m X P_n.at n=42A360194