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 A090062 #5 Mar 30 2012 17:27:41 %S A090062 89,98,167,187,266,286,365,385,479,563,578,583,662,677,682,749,761, %T A090062 776,779,781,829,860,869,875,880,899,928,947,968,974,977,998,1077, %U A090062 1093,1098,1167,1183,1188,1257,1273,1278,1297,1347,1363,1368,1387,1396,1397,1437 %N A090062 There is (presumably) one and only one palindrome in the Reverse and Add! trajectory of n. %C A090062 For terms < 2000 the only palindrome is reached from the start in at most 24 steps; thereafter no further palindrome is reached in 2000 steps. %H A090062 <a href="/index/Res#RAA">Index entries for sequences related to Reverse and Add!</a> %e A090062 The trajectory of 479 begins 479, 1453, 4994, 9988, 18887, ...; at 9988 it joins the (presumably) palindrome-free trajectory of A063048(3) = 1997, hence 4994 is the only palindrome in the trajectory of 479 and 479 is a term. %Y A090062 Cf. A023108, A023109, A065001, A070742, A077594. %K A090062 nonn,base %O A090062 1,1 %A A090062 _Klaus Brockhaus_, Nov 20 2003