cp's OEIS Frontend

This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

A121935 Decimal expansion of 1/log(3).

Original entry on oeis.org

9, 1, 0, 2, 3, 9, 2, 2, 6, 6, 2, 6, 8, 3, 7, 3, 9, 3, 6, 1, 4, 2, 4, 0, 1, 6, 5, 7, 3, 6, 1, 0, 7, 0, 0, 0, 6, 1, 2, 6, 3, 6, 0, 5, 7, 2, 5, 5, 2, 1, 1, 7, 4, 4, 7, 2, 6, 3, 0, 2, 0, 6, 3, 2, 9, 5, 2, 8, 1, 0, 8, 3, 1, 9, 3, 7, 9, 3, 7, 4, 6, 6, 4, 7, 2, 7, 1, 7, 8, 0, 8, 3, 8, 0, 8, 7, 1, 4, 8, 2, 8, 9, 7, 0, 1
Offset: 0

Views

Author

Joost de Winter, Sep 03 2006

Keywords

Examples

			0.9102392266268373936142401657361...
		

Crossrefs

Cf. A002391 (log(3)).

Programs

  • Magma
    SetDefaultRealField(RealField(100)); 1/Log(3); // G. C. Greubel, Oct 07 2019
    
  • Mathematica
    RealDigits[1/Log[3], 10, 105][[1]] (* Alonso del Arte, Dec 01 2012 *)
  • PARI
    d=105;default(realprecision,d+1);print(k=1/log(3));k=10*k;for(c=0,d,z=floor(k);print1(z,",");k=10*(k-z)) \\ Klaus Brockhaus, Sep 06 2006
    
  • Sage
    numerical_approx(1/log(3), digits=100) # G. C. Greubel, Oct 07 2019

Formula

Equals 1/log(3).
Equals (1/2) * Product_{k>=1} ((1 + 3^(1/2^k))/2). - Amiram Eldar, Jun 04 2023

Extensions

More terms from Klaus Brockhaus, Sep 06 2006