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A035913
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Coordination sequence for diamond structure D^+_74. (Edges defined by l_1 norm = 1.)
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1
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1, 0, 10952, 0, 19998352, 0, 14622792792, 0, 5738394543392, 0, 1404752160252392, 0, 235229004437967792, 0, 28681579910712931192, 0, 2664365874852346628672, 0, 195158177512774353963272, 0, 11580217136184545769201872, 0, 568940488664988221460830872, 0, 23565114430341328065270034272, 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=74.
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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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