571099domain: NPropertiesPrimalityPrimeyesAppears in sequencesArray read by antidiagonals: T(m,n) = number of edge covers in the grid graph P_m X P_n.at n=23A286912Array read by antidiagonals: T(m,n) = number of edge covers in the grid graph P_m X P_n.at n=25A286912Number of edge covers in the grid graph P_3 X P_n.at n=4A288031Prime numbersat n=46912