%I A102447
%S A102447 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,
%T A102447 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,
%U A102447 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
%N A102447 Decimal expansion of log_3 20.
%C A102447 Hausdorff dimension of Menger sponge.
%D A102447 Manfred Schroeder, Fractals, Chaos, Power Laws, Freeman,1991, p. 179.
%D A102447 Ian Stewart, Does God Play Dice?, The New Mathematics of Chaos, 2nd Ed., 
               Blackwell Pub'l., Malden MA, 2002, p. 207.
%H A102447 C. C. Bergemann, PlanetMath.org, <a href="http://planetmath.org/encyclopedia/
               MengerSponge.html">Menger sponge</a>
%H A102447 O. Knill, <a href="http://www.mathematik.com/Menger/Menger.html">Menger 
               Sponge</a>
%H A102447 School of Mathematics and Statistics, University of St Andrews, Scotland, 
               <a href="http://www-history.mcs.st-andrews.ac.uk/Mathematicians/Besicovitch.html">
               Abram Samoilovitch Besicovitch</a>.
%H A102447 Turnbull WWW Server, <a href="http://www-groups.dcs.st-and.ac.uk/~history/
               Mathematicians/Hausdorff.html">Felix Hausdorff</a>.
%H A102447 Wikipedia, The Free Encyclopedia, <a href="http://en.wikipedia.org/wiki/
               Hausdorff_dimension">Hausdorff dimension</a>.
%H A102447 Eric Weisstein's World of Mathematics, <a href="http://mathworld.wolfram.com/
               MengerSponge.html">Link to a section of The World of Mathematics</
               a>
%e A102447 2.72683302786084204139609463636416210490710364692981054479420028247...
%t A102447 RealDigits[ Log[3, 20], 10, 111][[1]]
%Y A102447 Cf. A100831, A102525, A113210, A152564.
%Y A102447 Sequence in context: A021371 A157513 A087706 this_sequence A151869 A010697 
               A088666
%Y A102447 Adjacent sequences: A102444 A102445 A102446 this_sequence A102448 A102449 
               A102450
%K A102447 cons,nonn
%O A102447 1,1
%A A102447 Robert G. Wilson v (rgwv(AT)rgwv.com), Feb 23 2005