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Search: id:A035908
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| A035908 |
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Coordination sequence for diamond structure D^+_64. (Edges defined by l_1 norm = 1.) |
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1
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| 1, 8192, 11190272, 6123315200, 1799375912960, 330122643283968, 41474426978451456, 3799040291725172736, 265525958014053580800, 14658590810928715735040, 656823409555679115329536, 24419567601184961681907712
(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=64.
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CROSSREFS
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Sequence in context: A017690 A010801 A138031 this_sequence A017689 A013961 A036091
Adjacent sequences: A035905 A035906 A035907 this_sequence A035909 A035910 A035911
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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 N. J. A. Sloane (njas(AT)research.att.com) Nov 27 1998.
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