login
This site is supported by donations to The OEIS Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A092466 a(n)=sum(i+j+k=n,(n+k)!/i!/j!/(2*k)!) 0<=j<=i<=k<=n. 0
1, 1, 3, 16, 41, 166, 777, 2472, 9781, 44506, 150953, 597334, 2661881, 9337511, 37044451, 162468924, 582650861, 2315651686, 10035973071, 36558456606, 145470310301, 624753156831, 2302445024223, 9169599427426, 39098606269531 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,3

LINKS

Table of n, a(n) for n=0..24.

PROG

(PARI) a(n)=sum(i=0, n, sum(j=0, i, sum(k=0, j, if(i+j+k-n, 0, (n+k)!/i!/j!/(2*k)!))))

CROSSREFS

Sequence in context: A081270 A271374 A147874 * A152618 A296947 A255211

Adjacent sequences:  A092463 A092464 A092465 * A092467 A092468 A092469

KEYWORD

nonn

AUTHOR

Benoit Cloitre, Mar 25 2004

STATUS

approved

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

License Agreements, Terms of Use, Privacy Policy. .

Last modified October 18 07:41 EDT 2019. Contains 328146 sequences. (Running on oeis4.)