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A035907 Coordination sequence for diamond structure D^+_62. (Edges defined by l_1 norm = 1.) 1
1, 0, 7688, 0, 9856016, 0, 5062048280, 0, 1396398655520, 0, 240550579435048, 0, 28384206701341744, 0, 2442767874758677048, 0, 160471399637289209920, 0, 8330250379684809297480, 0, 351158641745705372415056, 0, 12288946413958177271442008, 0, 363592488333694299036293216, 0 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,3

REFERENCES

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

LINKS

Georg Fischer, Table of n, a(n) for n = 0..200

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=62.

CROSSREFS

Sequence in context: A133859 A012082 A184026 * A307134 A183974 A234223

Adjacent sequences:  A035904 A035905 A035906 * A035908 A035909 A035910

KEYWORD

nonn

AUTHOR

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

EXTENSIONS

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

Zeroes inserted by Georg Fischer, Jul 26 2020

STATUS

approved

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Last modified January 22 20:58 EST 2022. Contains 350504 sequences. (Running on oeis4.)