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A035787
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Coordination sequence for C_50 lattice.
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6
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1, 5000, 4170000, 1394447000, 250799764000, 28222682700200, 2180706863326000, 123252789641763000, 5335428332027176000, 183203070393610797000, 5129723834328569406800, 119780004243882975543000, 2376073555319729124284000, 40672867087351099089831400
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OFFSET
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0,2
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LINKS
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J. H. Conway and N. J. A. Sloane, Low-Dimensional Lattices VII: Coordination Sequences, Proc. Royal Soc. London, A453 (1997), 2369-2389 (pdf).
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FORMULA
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a(n) = [x^(2n)] ((1+x)/(1-x))^50.
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CROSSREFS
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KEYWORD
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nonn,easy
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AUTHOR
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Joan Serra-Sagrista (jserra(AT)ccd.uab.es)
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EXTENSIONS
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STATUS
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approved
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