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Search: id:A008383
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| A008383 |
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Coordination sequence for A_4 lattice. |
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+0
2
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| 1, 20, 110, 340, 780, 1500, 2570, 4060, 6040, 8580, 11750, 15620, 20260, 25740, 32130, 39500, 47920, 57460, 68190, 80180, 93500, 108220, 124410, 142140, 161480, 182500, 205270, 229860, 256340
(list; graph; listen)
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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.
M. O'Keeffe, Coordination sequences for lattices, Zeit. f. Krist., 210 (1995), 905-908.
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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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35/3*n^3+25/3*n;
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CROSSREFS
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Sequence in context: A063785 A135174 A109854 this_sequence A024192 A086605 A107837
Adjacent sequences: A008380 A008381 A008382 this_sequence A008384 A008385 A008386
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KEYWORD
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nonn
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AUTHOR
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njas and J. H. Conway (conway(AT)math.princeton.edu)
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