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 A239235 #12 Jul 31 2022 07:44:12 %S A239235 1,2,3,4,5,6,7,8,9,10,12,1,14,15,16,17,18,19,20,21,22,101,23,24,25,26, %T A239235 27,28,29,30,31,32,33,102,34,35,36,37,38,39,40,41,42,43,44,103,45,46, %U A239235 47,48,49,50,51,52,53,54,55,104,56,57,58,59,60,61,62,63,64 %N A239235 The sequence S = a(1), a(2), ... is defined by a(1)=1, if d,e,f are consecutive digits then we do not have d = e <= f, and S is always extended with the smallest integer not yet present in S. %C A239235 Computed by _Lars Blomberg_. %D A239235 Eric Angelini, Posting to Sequence Fans Mailing List, Sep 28 2013 %H A239235 Eric Angelini, <a href="http://www.cetteadressecomportecinquantesignes.com/LittleEqualGreat.htm">Less than <, Equal to =, Greater than ></a> (see sequence Sv) %H A239235 Eric Angelini, <a href="/A239083/a239083.pdf">Less than <, Equal to =, Greater than ></a> [Cached copy, with permission of the author] %Y A239235 The sequences in this family are given in A239083-A239086, A239136-A239139, A239087-A239090, A239215-A239218, A239235. %K A239235 nonn,base %O A239235 1,2 %A A239235 _Michel Marcus_, Mar 13 2014