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A035821 Coordination sequence for lattice D*_72 (with edges defined by l_1 norm = 1). 0
1, 144, 10368, 497712, 17922816, 516475728, 12407366016, 255606154992, 4610216314368, 73962265817104, 1068744800817792, 14051355610010544, 169506887987474688, 1889504367838959312, 19580193687475702656 (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=72.

CROSSREFS

Sequence in context: A308285 A008662 A181014 * A231854 A055352 A199406

Adjacent sequences:  A035818 A035819 A035820 * A035822 A035823 A035824

KEYWORD

nonn

AUTHOR

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

STATUS

approved

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Last modified May 6 08:24 EDT 2021. Contains 343580 sequences. (Running on oeis4.)