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

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A111783 Tenth column (m=9) of unsigned triangle A111595. 0
1, 90, 5005, 223740, 8886735, 329819490, 11775438675, 411859047600, 14282642924550, 495142102154700, 17259324931198350, 607418587742967000, 21648370208790575250, 783042495355599979500, 28791389550204705674250 (list; graph; refs; listen; history; text; internal format)
OFFSET

9,2

LINKS

Table of n, a(n) for n=9..23.

FORMULA

E.g.f. (1/sqrt(1-x^2))*((x/(1-x))^9)/9!.

a(n)=(n!/9!)*sum(binomial(2*k, k)*binomial(n-2*k-1, 8)/(4^k), k=0..floor((n-9)/2)), n>=9.

CROSSREFS

Sequence in context: A197194 A281580 A111599 * A075918 A076010 A287021

Adjacent sequences:  A111780 A111781 A111782 * A111784 A111785 A111786

KEYWORD

nonn,easy

AUTHOR

Wolfdieter Lang, Aug 23 2005

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 November 19 03:48 EST 2019. Contains 329310 sequences. (Running on oeis4.)