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 A034216 #12 Jul 08 2025 20:09:44 %S A034216 1,1,4,20,144,1245,12473,120213,1067757,8508432,60801152,391078610, %T A034216 2277606189,12079172109,58646808981,261900799332,1080219903328, %U A034216 4129996450120,14683917874810,48687786994190,150930310833366 %N A034216 Number of ternary codes of length 4 with n words. %H A034216 Sean A. Irvine, <a href="/A034216/b034216.txt">Table of n, a(n) for n = 0..81</a> %H A034216 H. Fripertinger, <a href="http://www.mathe2.uni-bayreuth.de/frib/codes/tables.html">Isometry Classes of Codes</a> %H A034216 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 A034216 Cf. A034188-. %K A034216 nonn,fini,full %O A034216 0,3 %A A034216 _N. J. A. Sloane_