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Search: id:A035902
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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, 5408, 4878016, 1763889504, 342948774272, 41701747803040, 3480013344595008, 212293851572113376, 9911860859743707904, 366787510164531304992, 11058305237821938399680, 277765870809660966979168
(list; graph; listen)
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OFFSET
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0,2
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REFERENCES
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J. Serra-Sagrista, Enumeration of lattice points in l_1 norm, Information Processing Letters, 76, no. 1-2 (2000), 39-44.
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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 (Abstract, pdf, ps).
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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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Adjacent sequences: A035899 A035900 A035901 this_sequence A035903 A035904 A035905
Sequence in context: A057850 A058325 A126117 this_sequence A105654 A124410 A116894
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KEYWORD
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nonn
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AUTHOR
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J. Serra-Sagrista (jserra(AT)ccd.uab.es) Recomputed by njas Nov 27 1998.
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