# Greetings from The On-Line Encyclopedia of Integer Sequences! http://oeis.org/ Search: id:a074448 Showing 1-1 of 1 %I A074448 #25 Jul 21 2021 17:46:23 %S A074448 1,1,1,4,15,45,144,512,1841,6579,23808,87380,322875,1198665,4473647, %T A074448 16777216,63164175,238612920,904200192,3435973836,13089461538, %U A074448 49977848925,191219367936,733007751680,2814750270420,10825961287995,41699995927744,160842843834660,621186162441675 %N A074448 Number of 4-ary Lyndon words of length n over GF(4) with trace 1 and subtrace 0. %C A074448 Let x = RootOf(z^2 + z + 1) and y = 1 + x. Also the number of 4-ary Lyndon words of length n over GF(4) with trace x and subtrace 0. Also the number of 4-ary Lyndon words of length n over GF(4) with trace y and subtrace 0. %H A074448 F. Ruskey, 4-ary Lyndon words with given trace and subtrace over GF(4) %Y A074448 Cf. A074446, A074447, A074449, A074450. %Y A074448 Cf. A054660, A073995, A073996, A073997, A073998, A073999. %K A074448 nonn %O A074448 1,4 %A A074448 _Frank Ruskey_ and Nate Kube, Aug 23 2002 %E A074448 Terms a(16) and beyond from _Andrey Zabolotskiy_, Jul 21 2021 # Content is available under The OEIS End-User License Agreement: http://oeis.org/LICENSE