login
The OEIS is supported by the many generous donors to the OEIS Foundation.

 

Logo
Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A132574 Egyptian fraction representation for the cube root of 100. 111

%I #13 Dec 27 2015 03:58:54

%S 2,8,61,5118,461665855,623226225881980511,

%T 414504377324573765293514801448728784,

%U 236902165576254773155426469727218731977450593637429985699626109166408392

%N Egyptian fraction representation for the cube root of 100.

%C Fractional part of 100^(1/3) = 1/2 + 1/8 + 1/61 + ... Generated with Perl's Math::BigFloat module. Number of digits in terms is as follows: 1, 1, 2, 4, 9, 18, 36, 72, 144, 287, ...

%H G. Deslauriers and S. Dubuc, <a href="http://resolver.sub.uni-goettingen.de/purl?PPN378850199_0051/dmdlog6">Le calcul de la racine cubique selon Héron</a>, Elem. Math. 51 (1996), pp. 28-34.

%H Aoife Hennessy, <a href="http://repository.wit.ie/1693/1/AoifeThesis.pdf">A Study of Riordan Arrays with Applications to Continued Fractions, Orthogonal Polynomials and Lattice Paths</a>, Ph. D. Thesis, Waterford Institute of Technology, Oct. 2011.

%e Cube root of 100 = 4.6415888336127788924100763509194465765513491250112...

%t lst={};k=N[100^(1/3),1000];Do[s=Ceiling[1/k];AppendTo[lst,s];k=k-1/s,{n,12}];lst (* _Vladimir Joseph Stephan Orlovsky_, Nov 02 2009 *)

%Y Cf. A010670.

%K frac,nonn

%O 1,1

%A Jonathan Wellons (wellons(AT)gmail.com), Aug 23 2007

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

License Agreements, Terms of Use, Privacy Policy. .

Last modified April 25 03:15 EDT 2024. Contains 371964 sequences. (Running on oeis4.)