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Search: id:A035715
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| A035715 |
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Coordination sequence for 20-dimensional cubic lattice. |
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+0
1
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| 1, 40, 800, 10680, 107200, 864008, 5831520, 33940120, 174074240, 800061160, 3339504032, 12798246520, 45443741760, 150656183240, 469398016480, 1382296736088, 3866465104640, 10317238542760
(list; graph; listen)
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OFFSET
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0,2
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REFERENCES
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J. Serra-Sagrista, Enumeration of lattice points in l_1 norm, Information Processing Letters, 76, no. 1-2 (2000), 39-44.
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LINKS
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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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FORMULA
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((1+x)/(1-x))^20.
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CROSSREFS
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Sequence in context: A010956 A006240 A126928 this_sequence A035609 A010992 A004421
Adjacent sequences: A035712 A035713 A035714 this_sequence A035716 A035717 A035718
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KEYWORD
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nonn,easy
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AUTHOR
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Serra-Sagrista, Joan; jserra(AT)ccd.uab.es
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EXTENSIONS
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Recomputed Nov 25 1998 by N. J. A. Sloane (njas(AT)research.att.com).
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