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 A083513 #6 Aug 25 2014 11:58:50 %S A083513 10901,20702,30503,40304,50105,101070101,102050201,103030301, %T A083513 104010401,201050102,202030202,203010302,301030103,302010203, %U A083513 401010104,1010105010101,1010203020101,1010301030101,1020103010201,1020201020201 %N A083513 Palindromes in A083512. %C A083513 The last term of this sequences is 101010101010101010101. %C A083513 Has 31 terms. - _David Wasserman_, Nov 18 2004 %Y A083513 Cf. A083512. %K A083513 fini,nonn,base,full %O A083513 1,1 %A A083513 _Amarnath Murthy_ and Meenakshi Srikanth (menakan_s(AT)yahoo.com), May 05 2003 %E A083513 More terms from _David Wasserman_, Nov 18 2004