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REFERENCES
| V. Reddy and S. Skiena, Frequencies of large distances in integer lattices, in Graph theory, combinatorics and algoithms, Vol. 1, 2 (Kalamazoo, MI, 1992), 981-989, Wiley-Intersci. Publ., Wiley, New York, 1995.
N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).
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