Hi. I have a question on configuration numbers of graphs in lattices, often used in high dimension expansion of Ising model. A 2 point graph in a hypercubic d-dimensional lattice of N sites has a configuration number Nd, a square in the same lattice has Nd(d-1)/2. My question is: which is the configuration number of a 2 point graph and of a triangle graph in a triangular d-dimensional lattice? More generally, how are these numbers calculated? Is there any table where one can find them? Thanks in advance.(adsbygoogle = window.adsbygoogle || []).push({});

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# Coordination number in triangular lattice

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