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A035902 Coordination sequence for diamond structure D^+_52. (Edges defined by l_1 norm = 1.) 1
1, 0, 5408, 0, 4878016, 0, 1763889504, 0, 342948774272, 0, 41701747803040, 0, 3480013344595008, 0, 212293851572113376, 0, 9911860859743707904, 0, 366787510164531304992, 0, 11058305237821938399680, 0, 277765870809660966979168, 0, 5921283575038332646294656, 0, 108808265072142686985320608, 117093590311632896 (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=52.

CROSSREFS

Sequence in context: A340109 A190106 A252572 * A203711 A105654 A124410

Adjacent sequences:  A035899 A035900 A035901 * A035903 A035904 A035905

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 August 19 23:59 EDT 2022. Contains 356231 sequences. (Running on oeis4.)