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 A074410 #15 Jul 22 2025 11:14:15 %S A074410 1,1,1,4,11,45,169,576,1948,6579,23133,84820,317755,1198665,4509419, %T A074410 16908288,63409935,238612920,902444517,3429289164,13076666409, %U A074410 49977848925,191312873561,733365665600,2815437297416,10825961287995,41694907460224,160823214491940 %N A074410 Number of 4-ary Lyndon words of length n over Z_4 with trace 2 and subtrace 0. %H A074410 Max Alekseyev, <a href="http://home.gwu.edu/~maxal/gpscripts/">PARI/GP scripts for miscellaneous math problems</a> %H A074410 F. Ruskey, <a href="http://combos.org/TSlyndonZ4">4-ary Lyndon words with given trace and subtrace</a> %Y A074410 Cf. A068596, A074403, A074404, A074405, A074406, A074407, A074408, A074409, A074411, A074412, A074413. %K A074410 easy,nonn %O A074410 1,4 %A A074410 _Frank Ruskey_ and Nate Kube, Aug 22 2002 %E A074410 Terms a(15) onward from _Max Alekseyev_, Apr 09 2013