A035813 Coordination sequence for lattice D*_56 (with edges defined by l_1 norm = 1).

1, 112, 6272, 234192, 6560512, 147095984, 2750165376, 44107714576, 619570628096, 7744518260976, 87234261025408, 894539809017680, 8421733435019520, 73313390970875440, 593725756425591680

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=56.

Crossrefs

Sequence in context: A271032 A213803 A291214 * A223613 A075910 A089277

Adjacent sequences: A035810 A035811 A035812 * A035814 A035815 A035816

Keyword

nonn

Author

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

Status

approved