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A035815 Coordination sequence for lattice D*_60 (with edges defined by l_1 norm = 1). 0
1, 120, 7200, 288040, 8644800, 207648024, 4158723680, 71440725960, 1074729932160, 14385297437880, 173483353200288, 1904315460088680, 19187724061887040, 178728796729801560, 1548407735451345120 (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=60.

CROSSREFS

Sequence in context: A055213 A035190 A240934 * A001785 A223960 A156411

Adjacent sequences:  A035812 A035813 A035814 * A035816 A035817 A035818

KEYWORD

nonn

AUTHOR

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

STATUS

approved

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Last modified December 20 13:53 EST 2014. Contains 252266 sequences.