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A035759 Coordination sequence for C_22 lattice. 1
1, 968, 156816, 10286936, 368804128, 8453107432, 136585481648, 1663935545976, 16051394232896, 127269237312008, 853941394691792, 4962895187697048, 25459406230618976, 117088340731041064, 489035476964671472, 1875154363323009208, 6661774086773638272, 22100369343864328264 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

REFERENCES

R. Bacher, P. de la Harpe and B. Venkov, Series de croissance et series d'Ehrhart associees aux reseaux de racines, C. R. Acad. Sci. Paris, 325 (Series 1) (1997), 1137-1142.

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

LINKS

Seiichi Manyama, Table of n, a(n) for n = 0..10000

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

FORMULA

a(n) = [x^(2n)] ((1+x)/(1-x))^22.

CROSSREFS

Sequence in context: A142378 A035887 A255656 * A107555 A175991 A030251

Adjacent sequences:  A035756 A035757 A035758 * A035760 A035761 A035762

KEYWORD

nonn,easy

AUTHOR

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

EXTENSIONS

Recomputed by N. J. A. Sloane, Nov 25 1998

STATUS

approved

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Last modified December 7 09:15 EST 2021. Contains 349574 sequences. (Running on oeis4.)