|
Search: id:A111777
|
|
| |
|
| 1, 12, 130, 1380, 15435, 182280, 2302020, 30958200, 444230325, 6771510900, 109568809350, 1874844071100, 33875023557375, 644264598978000, 12877256933541000, 269789087886318000, 5915648230774907625
(list; graph; listen)
|
|
|
OFFSET
|
3,2
|
|
|
FORMULA
|
E.g.f. (1/sqrt(1-x^2))*((x/(1-x))^3)/3!.
a(n)=(n!/3!)*sum(binomial(2*k, k)*binomial(n-2*k-1, 2)/(4^k), k=0..floor((n-3)/2)), n>=3.
|
|
CROSSREFS
|
Sequence in context: A045508 A099157 A163414 this_sequence A160962 A097783 A078218
Adjacent sequences: A111774 A111775 A111776 this_sequence A111778 A111779 A111780
|
|
KEYWORD
|
nonn,easy
|
|
AUTHOR
|
Wolfdieter Lang (wolfdieter.lang_AT_physik_DOT_uni-karlsruhe_DOT_de), Aug 23 2005
|
|
|
Search completed in 0.002 seconds
|
