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Search: id:A035819
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| A035819 |
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Coordination sequence for lattice D*_68 (with edges defined by l_1 norm = 1). |
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1
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| 1, 136, 9248, 419288, 14260416, 388134888, 8807231072, 171389157176, 2920221095296, 44261088117832, 604286975278752, 7507398039179160, 85587416923429440, 901728467693644200, 8833008614958340320
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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=68.
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CROSSREFS
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Sequence in context: A015163 A072897 A071231 this_sequence A157880 A001330 A091510
Adjacent sequences: A035816 A035817 A035818 this_sequence A035820 A035821 A035822
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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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