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Search: id:A035611
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| A035611 |
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Coordination sequence for lattice D*_22 (with edges defined by l_1 norm = 1). |
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1
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| 1, 44, 968, 14212, 156816, 1388508, 10286936, 65652532, 368804128, 1854105484, 8453107432, 35333619428, 136677756336, 493244610364, 1672424817272, 5360494538388, 16327295550016, 47469373288172
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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=22.
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CROSSREFS
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Sequence in context: A010838 A010960 A035717 this_sequence A010996 A004423 A114170
Adjacent sequences: A035608 A035609 A035610 this_sequence A035612 A035613 A035614
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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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