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A035749
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Coordination sequence for C_12 lattice.
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3
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1, 288, 14016, 284000, 3281280, 25534368, 148321344, 688686048, 2681291520, 9060853280, 27266245056, 74501171808, 187641279616, 440840828064, 975339085632, 2047881308384, 4106643801600, 7906687806240, 14680871849152, 26386944188256, 46057341900672, 78285175220640
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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))^12.
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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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