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 A259086 #15 Jun 19 2015 16:34:54 %S A259086 168,59,1,28,38,25,16,22,28,20,22,7,19,20,4,10,27,11,8,13,13,12,5,23, %T A259086 23,18,42,7,31,4,10,13,11,5,11,11,8,12,12,9,7,10,10,4,7,10,3,18,7,0,8, %U A259086 3,6,2,8,4,12,5,4,5,6,4,8,16,2,3,5,2,7,11,12,1,5,9 %N A259086 a(n) = largest k such that the decimal representation of prime(n)^k does not contain the digit 2. %C A259086 These values are only conjectural. %H A259086 Hiroaki Yamanouchi, <a href="/A259086/b259086.txt">Table of n, a(n) for n = 1..500</a> %H A259086 Popular Computing (Calabasas, CA), <a href="/A094776/a094776.jpg">Two Tables</a>, Vol. 1, (No. 9, Dec 1973), page PC9-16. %Y A259086 Cf. A094776, A259081-A259085. %K A259086 nonn,base %O A259086 1,1 %A A259086 _N. J. A. Sloane_, Jun 18 2015 %E A259086 a(14)-a(74) from _Hiroaki Yamanouchi_, Jun 19 2015