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A035902
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Coordination sequence for diamond structure D^+_52. (Edges defined by l_1 norm = 1.)
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1
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1, 0, 5408, 0, 4878016, 0, 1763889504, 0, 342948774272, 0, 41701747803040, 0, 3480013344595008, 0, 212293851572113376, 0, 9911860859743707904, 0, 366787510164531304992, 0, 11058305237821938399680, 0, 277765870809660966979168, 0, 5921283575038332646294656, 0, 108808265072142686985320608, 117093590311632896
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OFFSET
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0,3
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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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MAPLE
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f := proc(m) local k, t1; t1 := 2^(n-1)*binomial((n+2*m)/2-1, n-1); if m mod 2 = 0 then t1 := t1+add(2^k*binomial(n, k)*binomial(m-1, k-1), k=0..n); fi; t1; end; where n=52.
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CROSSREFS
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KEYWORD
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nonn
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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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