A035825 Coordination sequence for lattice D*_80 (with edges defined by l_1 norm = 1).

1, 160, 12800, 682720, 27315200, 874496032, 23338104320, 534067024480, 10698844067840, 190617057780640, 3058431999744512, 44642243043558880, 597778600580572160, 7395049289720822560, 85027230683021319680

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=80.

Crossrefs

Sequence in context: A168527 A185492 A233909 * A183769 A190937 A163056

Adjacent sequences: A035822 A035823 A035824 * A035826 A035827 A035828

Keyword

nonn

Author

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

Status

approved