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 A348571 #40 Dec 13 2021 17:01:01 %S A348571 0,2,7,20,54,63,114,1002,1413,3007,4447,35131,599185,2189416,2738842, %T A348571 3253273,108250112 %N A348571 In Zeckendorf representation: integers that set a new record for the number of Reverse and Add steps (A349239) needed to reach a palindrome (A094202). %C A348571 Corresponding record values in A348572. %C A348571 For Zeckendorf representation of numbers see A014417. %C A348571 Lychrel numbers, as given in A348570, are excluded from this list because it is believed that those numbers never reach a palindrome. %H A348571 A.H.M. Smeets, <a href="/A348572/a348572_1.txt">Python program</a> %e A348571 Trajectory of 20, i.e., 101010 in Zeckendorf representation: %e A348571 101010 + 010101 = 1010100 %e A348571 1010100 + 0010101 = 10010010 %e A348571 10010010 + 01001001 = 100100100 %e A348571 100100100 + 001001001 = 1000010001 %e A348571 1000010001 + 1000100001 = 10100000010 %e A348571 10100000010 + 01000000101 = 100100001001, which is palindromic. %e A348571 Due to the fact that any number smaller than 20 reaches a palindrome in fewer than 6 steps, 20 is a record-setting nonnegative integer. %e A348571 The Lychrel numbers, as given in A348570, are excluded, because it is believed that those numbers never reach a palindromic number. %Y A348571 Cf. A014417 (Zeckendorf digits), A349239 (reverse and add), A094202 (palindromes). %Y A348571 Cf. A348572 (number of steps), A348570 (Lychrels). %K A348571 nonn,base,more %O A348571 1,2 %A A348571 _A.H.M. Smeets_, Oct 23 2021