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Search: id:A035475
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| A035475 |
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Coordination sequence for lattice D*_12 (with edges defined by l_1 norm = 1). |
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+0
1
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| 1, 24, 288, 2312, 14016, 68664, 288096, 1071912, 3600768, 11036504, 31125408, 81412680, 199013440, 457923960, 998269920, 2073758312, 4126016256, 7897561752, 14598964768, 26150436744, 45523755456
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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=12.
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CROSSREFS
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Sequence in context: A001496 A055754 A035707 this_sequence A042110 A086941 A128598
Adjacent sequences: A035472 A035473 A035474 this_sequence A035476 A035477 A035478
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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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