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A035815
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Coordination sequence for lattice D*_60 (with edges defined by l_1 norm = 1).
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0
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1, 120, 7200, 288040, 8644800, 207648024, 4158723680, 71440725960, 1074729932160, 14385297437880, 173483353200288, 1904315460088680, 19187724061887040, 178728796729801560, 1548407735451345120
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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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LINKS
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Table of n, a(n) for n=0..14.
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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=60.
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CROSSREFS
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Sequence in context: A177758 A055213 A035190 * A001785 A223960 A156411
Adjacent sequences: A035812 A035813 A035814 * A035816 A035817 A035818
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KEYWORD
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nonn
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AUTHOR
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N. J. A. Sloane, J. Serra-Sagrista (jserra(AT)ccd.uab.es)
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STATUS
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approved
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