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A035913 Coordination sequence for diamond structure D^+_74. (Edges defined by l_1 norm = 1.) 1
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 (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=74.

CROSSREFS

Sequence in context: A105716 A205052 A251170 * A124668 A270148 A270115

Adjacent sequences:  A035910 A035911 A035912 * A035914 A035915 A035916

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 May 18 22:37 EDT 2022. Contains 353826 sequences. (Running on oeis4.)