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 A034235 #11 Jul 08 2025 20:11:57 %S A034235 1,1,4,20,223,3227,77194,2097080,57796870,1502295684,36065804158, %T A034235 795109767172,16115614918786,301341514055753,5220182848555434, %U A034235 84132279974374399 %N A034235 Number of quaternary codes of length 4 with n words. %H A034235 Sean A. Irvine, <a href="/A034235/b034235.txt">Table of n, a(n) for n = 0..256</a> %H A034235 H. Fripertinger, <a href="http://www.mathe2.uni-bayreuth.de/frib/codes/tables.html">Isometry Classes of Codes</a> %H A034235 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 A034235 Cf. A034188-. %K A034235 nonn,fini,full %O A034235 0,3 %A A034235 _N. J. A. Sloane_