|
| |
| |
| |
|
|
|
OFFSET
| 0,1
|
|
|
COMMENTS
| If one uses the "table" view of array A062190, the sequence appears as the fourth column right from the middle in the "formatted as a triangular array" subpanel.
|
|
|
FORMULA
| C(4+2*n,n)*C(9+2*n,4+n).
a(n)=A002694(n+2)*A001700(n+4). - R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Nov 28 2008
|
|
|
EXAMPLE
| if n=0 then C(4+2*n,n)*C(9+2*n,4+n)=C(4,0)*C(9,4)=1*126=126
if n=7 then C(4+2*7,7)*C(9+2*7,4+7)=C(18,7)*C(23,11)=31824*1352078=43028530272
|
|
|
CROSSREFS
| Sequence in context: A196414 A133499 A202398 * A008397 A202593 A086024
Adjacent sequences: A113854 A113855 A113856 * A113858 A113859 A113860
|
|
|
KEYWORD
| easy,nonn
|
|
|
AUTHOR
| Zerinvary Lajos (zerinvarylajos(AT)yahoo.com), Feb 02 2006
|
|
|
EXTENSIONS
| Rephrased definition. - R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Nov 28 2008
|
| |
|
|