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 A084051 #6 Aug 25 2014 12:18:38 %S A084051 1,2,3,4,5,6,7,8,9,1,11,2,22,3,33,4,44,5,55,6,66,7,77,8,88,9,99,1,101, %T A084051 11,111,121,131,141,151,161,171,181,191,121,212,131,313,141,414,151, %U A084051 515,161,616,171,717,181,818,191,919,2,202,121,212,22,212,222,232,242,252 %N A084051 Smallest palindrome corresponding to A084050(n). %Y A084051 Cf. A044959, A084050. %K A084051 base,easy,nonn %O A084051 0,2 %A A084051 _Amarnath Murthy_ and Meenakshi Srikanth (menakan_s(AT)yahoo.com), May 26 2003 %E A084051 Corrected by _Rick L. Shepherd_, Jun 24 2005