login
The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 

Logo

Thanks to everyone who made a donation during our annual appeal!
To see the list of donors, or make a donation, see the OEIS Foundation home page.

Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A091034 Fourth column (k=5) of array A090438 ((4,2)-Stirling2) divided by 24. 2
1, 280, 70560, 19958400, 6659452800, 2644408166400, 1244905998336000, 689322235650048000, 444916954745303040000, 331767548149023866880000, 283424276847308960563200000, 275246422218908346286080000000 (list; graph; refs; listen; history; text; internal format)
OFFSET

3,2

LINKS

Table of n, a(n) for n=3..14.

FORMULA

a(n)=A090438(n, 5)/24, n>=3.

a(n)=(n-1)*(n-2)*(2*n-3)*(2*n)!/(5!*(3!)^2), n>=3.

E.g.f.:(sum(((-1)^(p+1))*binomial(5, p)*hypergeom([(p-1)/2, p/2], [], 4*x), p=2..5) + 4)/(5!*4!) (cf. A090438).

CROSSREFS

Cf. A091033 (third column of A090438), A091035 (fifth column).

Sequence in context: A272715 A282439 A255498 * A294165 A259079 A296506

Adjacent sequences:  A091031 A091032 A091033 * A091035 A091036 A091037

KEYWORD

nonn,easy

AUTHOR

Wolfdieter Lang, Jan 23 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 January 22 14:02 EST 2020. Contains 331149 sequences. (Running on oeis4.)