  We introduce the tetrahedron trinomial coefficient transform which takes a
Pascal-like arithmetical triangle to a sequence. We define a Pascal-like
infinite tetrahedron H, and prove that the application of the tetrahedron
trinomial transform to one face T of H provides the opposite edge E to T in H.
It follows from the construction that the other directions in H parallel to E
can be obtained similarly. In case of Pascal's triangle the sequence generated
by the trinomial transform coincides the binomial transform of the central
binomial coefficients.
