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

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A098275 Coefficients in a simultaneous approximation to Li(2,-1) and Li(3,-1). 1
1, 8, 264, 13040, 778840, 51955008, 3725735664, 281152383072, 22035642730200, 1778348612268800, 146898506147371264, 12366649337021296512, 1057604322007893443056, 91656070874708097813440 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

Table of n, a(n) for n=0..13.

W. Zudilin, Approximations to -, di and trilogarithms

FORMULA

Sum[i=0..n, Sum[j=0..n C(n, i)^2*C(n, j)^2*C(n+i, n)*C(n+j, n)]].

PROG

(PARI) a(n)=sum(i=0, n, sum(j=0, n, binomial(n, i)^2*binomial(n, j)^2*binomial(n+i, n)*binomial(i+j, i)))

CROSSREFS

Cf. A005258, A098274.

Sequence in context: A081058 A003386 A299328 * A221606 A230590 A300047

Adjacent sequences:  A098272 A098273 A098274 * A098276 A098277 A098278

KEYWORD

nonn,easy

AUTHOR

Ralf Stephan, Sep 03 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 July 22 10:03 EDT 2019. Contains 325219 sequences. (Running on oeis4.)