333735575domain: NAppears in sequencesArray read by antidiagonals: T(m,n) = number of edge covers in the grid graph P_m X P_n.at n=38A286912Array read by antidiagonals: T(m,n) = number of edge covers in the grid graph P_m X P_n.at n=42A286912Number of edge covers in the grid graph P_3 X P_n.at n=6A288031