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A035762
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Coordination sequence for C_25 lattice.
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1
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1, 1250, 261250, 22049250, 1012597250, 29557550050, 604033925250, 9235138753250, 110890799925250, 1085175523649250, 8910448028600450, 62842745595873250, 388036691221877250, 2131248564724282850, 10551253249450808450, 47616507731413151970, 197765489522704130050
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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))^25.
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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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