login
The OEIS is supported by the many generous donors to the OEIS Foundation.

 

Logo
Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A119364 Central coefficients of number triangle A119335. 1
0, 1, 1, 1, 11, 81, 351, 1149, 3529, 12601, 52724, 222641, 879308, 3295384, 12303201, 47320365, 186738507, 739129809, 2894481813, 11237844615, 43647142533, 170543919327, 669744238998, 2633027605209, 10337488816041, 40544676533466 (list; graph; refs; listen; history; text; internal format)
OFFSET
0,5
COMMENTS
A119363(n)-a(n)=A119365(n).
LINKS
FORMULA
a(n)=sum{k=0..n-1, C(n+1,3k)*C(n-1,3k)}; a(n)=A119335(2n,n+1).
CROSSREFS
Sequence in context: A024146 A233176 A156847 * A305826 A252817 A210064
KEYWORD
easy,nonn
AUTHOR
Paul Barry, May 16 2006
STATUS
approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recents
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified July 23 11:07 EDT 2024. Contains 374549 sequences. (Running on oeis4.)