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A035820 Coordination sequence for lattice D*_70 (with edges defined by l_1 norm = 1). 0
1, 140, 9800, 457380, 16013200, 448644028, 10479036120, 209901182420, 3681129969440, 57425278222060, 806898799084392, 10316605397801220, 121032811973584560, 1312159718129050140, 13225339591553573880 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

REFERENCES

J. Serra-Sagrista, Enumeration of lattice points in l_1 norm, Information Processing Letters, 76, no. 1-2 (2000), 39-44.

LINKS

Table of n, a(n) for n=0..14.

FORMULA

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=70.

CROSSREFS

Sequence in context: A223349 A282613 A202786 * A075915 A159362 A188255

Adjacent sequences:  A035817 A035818 A035819 * A035821 A035822 A035823

KEYWORD

nonn

AUTHOR

N. J. A. Sloane, J. Serra-Sagrista (jserra(AT)ccd.uab.es)

STATUS

approved

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Last modified April 10 21:21 EDT 2021. Contains 342856 sequences. (Running on oeis4.)