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A035765
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Coordination sequence for C_28 lattice.
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1
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1, 1568, 410816, 43381856, 2485013888, 90102925472, 2275791199808, 42760427177696, 627099015232256, 7446658555097888, 73704171158808512, 622408788864127328, 4571394778282027136, 29672618403243206048, 172523643553950122304, 908874759952534074336, 4381165944112803116544
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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))^28.
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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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