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.
%I A141472 #3 Mar 30 2012 18:51:58 %S A141472 1,1,2,3,3,4,5,7,8,9,11,11,11,11,11,12,17,19,19,19,22,23,24,25,27,29, %T A141472 30,31,33,36,36,37,37,38,41,41,45,45,47,47,48,51,53,54,55,56,57,57,57, %U A141472 58,58,59,59,59,61,64,69,71,71,73,73,75,76,76,79,83,86,87,88 %N A141472 Number of digits in A139067(n). %Y A141472 Cf. A139067. %K A141472 nonn,base %O A141472 1,3 %A A141472 _Paul Curtz_ and _Ray Chandler_, Aug 14 2008