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A035926
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Coordination sequence for diamond structure D^+_100. (Edges defined by l_1 norm = 1.)
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2
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1, 0, 20000, 0, 66680000, 0, 88977788000, 0, 63669939056000, 0, 28388261970800800, 0, 8645481416595304000, 0, 1913769409906455052000, 0, 322081772124335598304000, 0, 42639787126552298702388000, 0, 4560880160205473732557707200, 0, 402747462617285816887874972000, 0, 29887395794995795375534035536000, 0
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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=100.
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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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