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 A102825 #4 Oct 06 2013 23:40:48 %S A102825 0,1,2,3,5,6,9,11,14,17,18,24,25,27,31,38,41,42,45,50,51,54,63,68,69, %T A102825 72,78,81,88,94,98,104,108,110,113,116,122,125,129,132,135,143,147, %U A102825 150,153,159,162,174,180,188,192,198,204,207,213,216,225,231 %N A102825 "True already", base 3, start 0: a(n) is the least integer such that the sequence up to a(n-1) written in base 3 contains floor(a(n)/3) copies of the digit a(n) % 3, with a(0) = 0. %D A102825 Inspired by discussion of "True so far" from _Eric Angelini_ (A102357). %Y A102825 Cf. A102823-A102830, A102357. %K A102825 nonn,easy,base %O A102825 0,3 %A A102825 _Hugo van der Sanden_, Feb 26 2005