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 A326414 #23 Jun 23 2022 13:42:59 %S A326414 12000700000025339936491,12000700001015339936491, %T A326414 12000700002005339936491,12000700010024339936491, %U A326414 12000700011014339936491,12000700012004339936491,12000700020023339936491,12000700021013339936491,12000700022003339936491,12000700030022339936491 %N A326414 Numbers which require exactly 288 'Reverse and Add' steps to reach a palindrome. %D A326414 Popular Computing (Calabasas, CA), The 196 Problem, Vol. 3 (No. 30, Sep 1975). %H A326414 Sergei D. Shchebetov, <a href="/A326414/b326414.txt">Table of n, a(n) for n = 1..10000</a> %H A326414 Jason Doucette, <a href="http://jasondoucette.com/worldrecords.html">World Records</a> %H A326414 Yutaka Nishiyama, <a href="http://www.ijpam.eu/contents/2012-80-3/9/index.html">Numerical Palindromes and the 196 Problem</a>, International Journal of Pure and Applied Mathematics, Volume 80, No. 3, 2012, 375-384. %H A326414 Sergei D. Shchebetov, <a href="https://yadi.sk/d/1m0LVhM8WtaBMg">19353600 terms (zipped file)</a> %H A326414 R. Styer, <a href="http://www41.homepage.villanova.edu/robert.styer/PalindromePaper1986.pdf">The Palindromic Conjecture and the Fibonacci Sequence</a>, Villanova University, 1986, 1-11. %H A326414 C. W. Trigg, <a href="http://www.jstor.org/stable/2689178">Palindromes by Addition</a>, Mathematics Magazine, 40 (1967), 26-28. %H A326414 C. W. Trigg, <a href="http://www.jstor.org/stable/2688651">More on Palindromes by Reversal-Addition</a>, Mathematics Magazine, 45 (1972), 184-186. %H A326414 Wikipedia, <a href="https://en.wikipedia.org/wiki/Lychrel_number">Lychrel Number</a> %H A326414 196 and Other Lychrel Numbers, <a href="http://www.p196.org/">196 and Lychrel Number</a> %H A326414 <a href="https://oeis.org/wiki/Index_to_OEIS:_Section_Res#RAA">Index entries for sequences related to Reverse and Add!</a> %F A326414 Each term requires exactly 288 steps to turn into a 142-digit palindrome. %Y A326414 Cf. A023109, A033672, A065198, A065199, A065320, A065321, A065322, A065323, A065324, A065325, A065326, A065327, A070743, A072216, A072217, A072218, A281301, A281390, A281506, A281507. %K A326414 nonn,base,less %O A326414 1,1 %A A326414 Andrey S. Shchebetov and _Sergei D. Shchebetov_, Oct 18 2019 %E A326414 Deleted an erroneous comment that said that the sequence was finite. - _N. J. A. Sloane_, Jun 23 2022