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Search: id:A008361
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| A008361 |
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Coordination sequence for D_8 lattice. |
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+0
2
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| 1, 112, 2592, 25424, 149568, 629808, 2100832, 5910288, 14610560, 32641008, 67232416, 129565392, 236214464, 410909616, 686647008, 1108180624, 1734926592, 2644311920, 3935599392, 5734220368
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OFFSET
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0,2
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REFERENCES
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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.
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LINKS
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T. D. Noe, Table of n, a(n) for n=0..1000
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).
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MAPLE
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1984/315*n^7+1888/45*n^5+2368/45*n^3+1168/105*n;
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CROSSREFS
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A row of array A103903.
Sequence in context: A119742 A047631 A008430 this_sequence A103860 A035813 A075910
Adjacent sequences: A008358 A008359 A008360 this_sequence A008362 A008363 A008364
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KEYWORD
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nonn,nice,easy
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AUTHOR
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njas and J. H. Conway (conway(AT)math.princeton.edu)
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