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A035884
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Coordination sequence for diamond structure D^+_16. (Edges defined by l_1 norm = 1.)
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0
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1, 0, 512, 0, 44032, 0, 1549824, 0, 30349312, 524288, 391784960, 26738688, 3702064128, 508035072, 27315850752, 5588385792, 164415418368, 42844291072, 834237682176, 253170810880, 3662806408192, 1226904698880
(list; graph; refs; listen; history; internal format)
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OFFSET
| 0,3
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REFERENCES
| 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
| 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
| 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=16.
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CROSSREFS
| Sequence in context: A069410 A069436 A139303 * A035596 A095843 A095882
Adjacent sequences: A035881 A035882 A035883 * A035885 A035886 A035887
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KEYWORD
| nonn
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AUTHOR
| J. Serra-Sagrista (jserra(AT)ccd.uab.es) Recomputed by N. J. A. Sloane (njas(AT)research.att.com) Nov 27 1998.
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