A035821 Coordination sequence for lattice D*_72 (with edges defined by l_1 norm = 1).

1, 144, 10368, 497712, 17922816, 516475728, 12407366016, 255606154992, 4610216314368, 73962265817104, 1068744800817792, 14051355610010544, 169506887987474688, 1889504367838959312, 19580193687475702656

Offset

0,2

Links

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

Joan Serra-Sagrista, Enumeration of lattice points in l_1 norm, Inf. Proc. Lett. 76 (1-2) (2000) 39-44.

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