1,1

The hexagonal lattice is the familiar 2-dimensional lattice in which each point has 6 neighbors. This is sometimes called the triangular lattice.

J. Blease, Series expansions for the directed-bond percolation problem, J. Phys. C 10 (1977), 917-924.

G. Nebe and N. J. A. Sloane, Home page for hexagonal (or triangular) lattice A2

Sequence in context: A014286 A000714 A090984 this_sequence A056823 A105544 A119917

Adjacent sequences: A006810 A006811 A006812 this_sequence A006814 A006815 A006816

nonn

njas