1620034domain: NAppears in sequencesNumber of Hamiltonian paths in P_6 X P_n.at n=6A145402Number of Hamiltonian paths in P_7 X P_n.at n=5A358794Triangle read by rows: T(n,k) is the number of paths traveling orthogonally on an n X k grid that visit every cell.at n=26A366399