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Search: id:A035474
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| A035474 |
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Coordination sequence for lattice D*_10 (with edges defined by l_1 norm = 1). |
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+0
2
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| 1, 20, 200, 1340, 6800, 29028, 108120, 355980, 1047840, 2793140, 6830056, 15502300, 32993200, 66410500, 127335800, 233975084, 414071360, 708767060, 1177632520, 1905107580, 3008636112, 4648808100
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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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FORMULA
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a(m)=add(2^k*binomial(n, k)*binomial(m-1, k-1), k=0..n)+2^n*binomial((n+2*m)/2-1, n-1); with n=10.
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CROSSREFS
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Sequence in context: A126901 A008420 A045758 this_sequence A103261 A120796 A120787
Adjacent sequences: A035471 A035472 A035473 this_sequence A035475 A035476 A035477
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KEYWORD
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nonn
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AUTHOR
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N. J. A. Sloane (njas(AT)research.att.com), J. Serra-Sagrista (jserra(AT)ccd.uab.es)
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