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 A034221 #12 Jul 08 2025 20:10:18 %S A034221 1,1,9,179,23750,17404018,30640203562,69308975221311, %T A034221 158348647910702036,337705364634088701870,658924882943438469999753, %U A034221 1175202923618550525380785445,1924770620147760792778941634653 %N A034221 Number of ternary codes of length 9 with n words. %C A034221 a(3^9)=1 is the last term. - _Sean A. Irvine_, Aug 07 2020 %H A034221 H. Fripertinger, <a href="http://www.mathe2.uni-bayreuth.de/frib/codes/tables.html">Isometry Classes of Codes</a> %H A034221 H. Fripertinger, <a href="https://doi.org/10.1023/A:1008248618779">Enumeration, construction and random generation of block codes</a>, Designs, Codes, Crypt., 14 (1998), 213-219. %Y A034221 Cf. A034188-. %K A034221 nonn,fini %O A034221 0,3 %A A034221 _N. J. A. Sloane_