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Search: id:A035473
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| A035473 |
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Coordination sequence for lattice D*_8 (with edges defined by l_1 norm = 1). |
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1
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| 1, 16, 128, 688, 3072, 11472, 36224, 99184, 241664, 535440, 1097344, 2107952, 3834880, 6661200, 11119488, 17932016, 28057600, 42745616, 63597696, 92637616, 132389888, 185967568, 257169792, 350589552
(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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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=8.
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CROSSREFS
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Sequence in context: A008535 A008416 A045651 this_sequence A014972 A115977 A128692
Adjacent sequences: A035470 A035471 A035472 this_sequence A035474 A035475 A035476
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KEYWORD
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nonn
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AUTHOR
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njas, J. Serra-Sagrista (jserra(AT)ccd.uab.es)
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