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 A090075 #5 Mar 30 2012 17:27:41 %S A090075 11,9,8,9,12,10,11,11,11,11,11,11,11,11,11,11,11,11,11,11,11,11,11,11, %T A090075 11,11 %N A090075 (Presumed) number of palindromes in the Reverse and Add! trajectory of 10^n. %C A090075 The absolute maximum 12 at n = 4 and a(n) = 11 for n > 5 support the conjecture (cf. A077594) that there is no positive integer whose trajectory contains more than twelve palindromes. %C A090075 The last palindrome in the Reverse and Add! trajectory of 10^n is given in A090074. %H A090075 <a href="/index/Res#RAA">Index entries for sequences related to Reverse and Add!</a> %Y A090075 Cf. A065001, A070742, A077594, A090069, A090070, A090071, A090072, A090074. %K A090075 nonn,base %O A090075 0,1 %A A090075 _Klaus Brockhaus_, Nov 20 2003