88418domain: NAppears in sequencesNumber of Hamiltonian paths from NW to SW corners in an n X n grid.at n=6A000532Numbers k such that k and k^2 use only the digits 1, 2, 4, 7 and 8.at n=32A136997Number of directed Hamiltonian walks from NW to SW corners of a 7 X (2*n+1) grid.at n=3A333603