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 A090074 #5 Mar 30 2012 17:27:41 %S A090074 3654563,678736545637876,663305503366,663787366, %T A090074 88352682264077046228625388,365468864563,3654566654563,36545633654563, %U A090074 365456303654563,3654563003654563,36545630003654563,365456300003654563 %N A090074 (Presumed) last palindrome in the Reverse and Add! trajectory of 10^n. %C A090074 No further palindrome is reached in 5000 steps. %C A090074 The number of palindromes in the Reverse and Add! trajectory of 10^n is given in A090075. %H A090074 <a href="/index/Res#RAA">Index entries for sequences related to Reverse and Add!</a> %F A090074 a(n) = 3654563*10^(n) + 3654563 for n > 5. %Y A090074 Cf. A065001, A070742, A077594, A090069, A090070, A090071, A090072, A090075. %K A090074 nonn,base %O A090074 0,1 %A A090074 _Klaus Brockhaus_, Nov 20 2003