1,1
Eric Weisstein's World of Mathematics, Hamiltonian Path
Eric Weisstein's World of Mathematics, Torus Grid Graph
Sequence in context: A052783 A112002 A004033 * A056271 A000920 A052779
Adjacent sequences: A137888 A137889 A137890 * A137892 A137893 A137894
nonn,more,bref
E. W. Weisstein (eric(AT)weisstein.com), Feb 20, 2008