Equilateral Triangles in 3D with Integer Coordinates
http://demonstrations.wolfram.com/Equ...
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The number of equilateral triangles with integer coordinates in a cube of size n depends on the "minimal" equilateral triangles defined in such a cube and all the transformations of such triangles. This Demonstration shows the minimal triangles along wi...
Contributed by: Rodrigo A. Obando
After work by: Eugen Ionascu