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 A074446 #21 Jul 21 2021 17:45:50
%S A074446 1,0,2,6,15,40,153,528,1841,6528,23901,87550,322875,1198080,4474738,
%T A074446 16779264,63164175,238605640,904213989,3436000050,13089461538,
%U A074446 49977753600,191219550297,733008101200,2814750270420,10825959997440,41699998413248,160842848628150,621186162441675
%N A074446 Number of 4-ary Lyndon words of length n over GF(4) with trace 0 and subtrace 0.
%H A074446 F. Ruskey, <a href="http://combos.org/TSlyndonF4">4-ary Lyndon words with given trace and subtrace over GF(4)</a>
%e A074446 a(3;0,0)=2 since the two 4-ary Lyndon words of trace 0, subtrace 0 and length 3 are { 123, 132 }.
%Y A074446 Cf. A074447, A074448, A074449, A074450.
%Y A074446 Cf. A054661, A073995, A073996, A073997, A073998, A073999.
%K A074446 nonn
%O A074446 1,3
%A A074446 _Frank Ruskey_ and Nate Kube, Aug 23 2002
%E A074446 Terms a(16) and beyond from _Andrey Zabolotskiy_, Jul 21 2021