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A035920 Coordination sequence for diamond structure D^+_88. (Edges defined by l_1 norm = 1.) 1
1, 0, 15488, 0, 39990016, 0, 41333677440, 0, 22916557452800, 0, 7919942966638208, 0, 1870534029816486144, 0, 321315959969540069248, 0, 41994780120899506334720, 0, 4321124706193758340042880, 0, 359578487180206655473139456, 0, 24728329402573005235848884608, 0, 1430744078752131145758438498816, 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=88.

CROSSREFS

Sequence in context: A210058 A154091 A246912 * A342310 A201344 A235278

Adjacent sequences:  A035917 A035918 A035919 * A035921 A035922 A035923

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 October 18 23:44 EDT 2021. Contains 348071 sequences. (Running on oeis4.)