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 A015988 #7 Mar 30 2012 17:30:17 %S A015988 193,292,391,490,589,688,787,886,949,985,1993,1995,2992,2994,3991, %T A015988 3993,4990,4992,5991,6990,8059,8149,8239,8329,8419,8509,8599,8689, %U A015988 8779,8869,8959,9058,9069,9089,9148,9159,9179,9238,9249,9269,9328 %N A015988 Eight iterations of Reverse and Add are needed to reach a palindrome. %C A015988 The number of iterations starts at 1, so palindromes (cf. A002113) are not excluded. The corresponding sequence excluding palindromes is A065213. %H A015988 <a href="/index/Res#RAA">Index entries for sequences related to Reverse and Add!</a> %Y A015988 A002113, A065213. %K A015988 nonn,base %O A015988 0,1 %A A015988 _Robert G. Wilson v_