A square-shaped neighborhood that can be used to define a set of cells surrounding a given cell that may affect the evolution of a two-dimensional cellular automaton on a square grid. The Moore neighborhood of range is defined by
Moore neighborhoods for ranges , 1, 2, and 3 are illustrated above. The number of cells in the Moore neighborhood of range is the odd squares , the first few of which are 1, 9, 25, 49, 81, ... (OEIS A016754).