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A035761 Coordination sequence for C_24 lattice. +0
1
1, 1152, 221952, 17282432, 733189632, 19804348032, 375282559232, 5332713820032, 59660218248192, 545370276747392, 4193961783144192, 27773897706129792, 161439727075246592, 836741699281154688 (list; graph; listen)
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

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

FORMULA

((1+x)/(1-x))^24 if norm is even; otherwise 0.

CROSSREFS

Sequence in context: A131527 A170775 A166490 this_sequence A107557 A020382 A046390

Adjacent sequences: A035758 A035759 A035760 this_sequence A035762 A035763 A035764

KEYWORD

nonn,easy

AUTHOR

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

EXTENSIONS

Recomputed Nov 25 1998 by N. J. A. Sloane (njas(AT)research.att.com).

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Last modified December 21 10:15 EST 2009. Contains 171081 sequences.


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