|
Search: id:A035770
|
|
|
| A035770 |
|
Coordination sequence for C_33 lattice. |
|
+0
1
|
|
| 1, 2178, 792066, 115852418, 9160333314, 456334097538, 15745443972610, 401492555264130, 7932626513059842, 125920628852842626, 1652497769389663746, 18348947281180593282, 175716931633807644674, 1474714295561130964098
(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))^33 if norm is even; otherwise 0.
|
|
CROSSREFS
|
Sequence in context: A126844 A072141 A008918 this_sequence A107566 A073142 A137874
Adjacent sequences: A035767 A035768 A035769 this_sequence A035771 A035772 A035773
|
|
KEYWORD
|
nonn,easy
|
|
AUTHOR
|
Serra-Sagrista, Joan; jserra(AT)ccd.uab.es
|
|
EXTENSIONS
|
Recomputed Nov 25 1998 by njas.
|
|
|
Search completed in 0.005 seconds
|
