|
Search: id:A035830
|
|
|
| A035830 |
|
Coordination sequence for lattice D*_90 (with edges defined by l_1 norm = 1). |
|
+0
1
|
|
| 1, 180, 16200, 972060, 43750800, 1575612036, 47297528280, 1217347592940, 27425793987360, 549462705652820, 9912269336940648, 162650331363653820, 2448015194902257840, 34033222209800507940, 439668298578779894520
(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=90.
|
|
CROSSREFS
|
Sequence in context: A058835 A008432 A008378 this_sequence A091033 A146530 A057867
Adjacent sequences: A035827 A035828 A035829 this_sequence A035831 A035832 A035833
|
|
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
|
