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

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A295441 a(n) = (9*n)!*n!/((5*n)!*(3*n)!*(2*n)!). 1
1, 252, 204204, 191222460, 190004674860, 195022529167752, 204320742803699340, 217111359982448115765, 233102038867603938770220, 252255185100017685406870560, 274687728872310943504451521704, 300625891932698784845526074953032, 330384570746416514397560106035996940 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

Table of n, a(n) for n=0..12.

FORMULA

G.f.: hypergeom([1/9, 2/9, 4/9, 5/9, 7/9, 8/9], [1/5, 2/5, 1/2, 3/5, 4/5], 14348907/12500*x).

MATHEMATICA

f[n_] := (9n)! n!/((5n)! (3n)! (2n)!); Array[f, 13, 0] (* or *) CoefficientList[ Series[ HypergeometricPFQ[{1/9, 2/9, 4/9, 5/9, 7/9, 8/9}, {1/5, 2/5, 1/2, 3/5, 4/5}, 14348907/12500 x], {x, 0, 12}], x] (* Robert G. Wilson v, Nov 23 2017 *)

CROSSREFS

Cf. A295431.

Sequence in context: A289567 A179714 A109929 * A203062 A259452 A177302

Adjacent sequences:  A295438 A295439 A295440 * A295442 A295443 A295444

KEYWORD

nonn

AUTHOR

Gheorghe Coserea, Nov 23 2017

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 27 03:56 EST 2021. Contains 349345 sequences. (Running on oeis4.)