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

 

Logo

Annual Appeal: Please make a donation to keep the OEIS running. In 2018 we replaced the server with a faster one, added 20000 new sequences, and reached 7000 citations (often saying "discovered thanks to the OEIS").
Other ways to donate

Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A102447 Decimal expansion of log_3 20. 2
2, 7, 2, 6, 8, 3, 3, 0, 2, 7, 8, 6, 0, 8, 4, 2, 0, 4, 1, 3, 9, 6, 0, 9, 4, 6, 3, 6, 3, 6, 4, 1, 6, 2, 1, 0, 4, 9, 0, 7, 1, 0, 3, 6, 4, 6, 9, 2, 9, 8, 1, 0, 5, 4, 4, 7, 9, 4, 2, 0, 0, 2, 8, 2, 4, 7, 2, 8, 6, 2, 6, 7, 8, 9, 5, 2, 8, 5, 5, 4, 3, 3, 7, 7, 7, 9, 3, 8, 4, 9, 0, 8, 5, 8, 4, 3, 2, 9, 8, 2, 5, 6, 1, 2, 0 (list; constant; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Hausdorff dimension of Menger sponge.

REFERENCES

Manfred Schroeder, Fractals, Chaos, Power Laws, Freeman,1991, p. 179.

Ian Stewart, Does God Play Dice?, The New Mathematics of Chaos, 2nd Ed., Blackwell Pub'l., Malden MA, 2002, p. 207.

LINKS

Vincenzo Librandi, Table of n, a(n) for n = 1..1000

C. C. Bergemann, PlanetMath.org, Menger sponge

O. Knill, Menger Sponge

School of Mathematics and Statistics, University of St Andrews, Scotland, Abram Samoilovitch Besicovitch.

Turnbull WWW Server, Felix Hausdorff.

Wikipedia, The Free Encyclopedia, Hausdorff dimension.

Eric Weisstein's World of Mathematics, Menger Sponge

EXAMPLE

2.72683302786084204139609463636416210490710364692981054479420028247...

MATHEMATICA

RealDigits[ Log[3, 20], 10, 111][[1]]

CROSSREFS

Cf. A100831, A102525, A113210, A152564.

Sequence in context: A021371 A157513 A087706 * A151869 A262083 A181284

Adjacent sequences:  A102444 A102445 A102446 * A102448 A102449 A102450

KEYWORD

cons,nonn

AUTHOR

Robert G. Wilson v, Feb 23 2005

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 December 15 01:20 EST 2018. Contains 318141 sequences. (Running on oeis4.)