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 A114613 #11 Feb 16 2025 08:32:59 %S A114613 20169,20709,21159,22149,23139,24129,25119,26109,27099,28089,29079, %T A114613 30159,30168,30708,30789,31149,31158,31779,32139,32148,32769,33129, %U A114613 33138,33759,34119,34128,34749,35109,35118,35739,36108,36729,37098 %N A114613 Starting numbers for which the RATS sequence has eventual period 3. %C A114613 A114611(a(n)) = 3. - _Reinhard Zumkeller_, Mar 14 2012 %H A114613 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/RATSSequence.html">RATS Sequence</a> %Y A114613 Cf. A114611, A114612, A114613, A114614, A114615, A114616. %Y A114613 Cf. A209878, A036839. %K A114613 nonn,base %O A114613 1,1 %A A114613 _Eric W. Weisstein_, Dec 16 2005