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A035773
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Coordination sequence for C_36 lattice.
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1
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1, 2592, 1121472, 194986080, 18300435840, 1080041397408, 44042615547456, 1323529602867936, 30721376739859200, 570951048018417440, 8740606046237286336, 112789007191042473312, 1250374850905568180352
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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))^36.
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MAPLE
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seq(coeff(series(((1+x)/(1-x))^36, x, n+1), x, n), n=0..30, 2); # Muniru A Asiru, Aug 12 2018
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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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