|
Search: id:A035820
|
|
|
| A035820 |
|
Coordination sequence for lattice D*_70 (with edges defined by l_1 norm = 1). |
|
+0
1
|
|
| 1, 140, 9800, 457380, 16013200, 448644028, 10479036120, 209901182420, 3681129969440, 57425278222060, 806898799084392, 10316605397801220, 121032811973584560, 1312159718129050140, 13225339591553573880
(list; graph; listen)
|
|
|
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.
|
|
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=70.
|
|
CROSSREFS
|
Sequence in context: A133711 A128193 A061607 this_sequence A075915 A159362 A159366
Adjacent sequences: A035817 A035818 A035819 this_sequence A035821 A035822 A035823
|
|
KEYWORD
|
nonn
|
|
AUTHOR
|
N. J. A. Sloane (njas(AT)research.att.com), J. Serra-Sagrista (jserra(AT)ccd.uab.es)
|
|
|
Search completed in 0.002 seconds
|
