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A035908 Coordination sequence for diamond structure D^+_64. (Edges defined by l_1 norm = 1.) 0
1, 8192, 11190272, 6123315200, 1799375912960, 330122643283968, 41474426978451456, 3799040291725172736, 265525958014053580800, 14658590810928715735040, 656823409555679115329536, 24419567601184961681907712 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

REFERENCES

J. Serra-Sagrista, Enumeration of lattice points in l_1 norm, Information Processing Letters, 76, no. 1-2 (2000), 39-44.

LINKS

Table of n, a(n) for n=0..11.

J. H. Conway and N. J. A. Sloane, Low-Dimensional Lattices VII: Coordination Sequences, Proc. Royal Soc. London, A453 (1997), 2369-2389 (pdf).

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=64.

CROSSREFS

Sequence in context: A138031 A236221 A300567 * A323544 A230190 A017689

Adjacent sequences:  A035905 A035906 A035907 * A035909 A035910 A035911

KEYWORD

nonn

AUTHOR

Joan Serra-Sagrista (jserra(AT)ccd.uab.es)

EXTENSIONS

Recomputed by N. J. A. Sloane, Nov 27 1998

STATUS

approved

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Last modified May 27 02:54 EDT 2019. Contains 323597 sequences. (Running on oeis4.)