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Number of 6-ary Lyndon words of length n with trace 2 and subtrace 5 over Z_6.
21

%I #11 May 03 2019 07:19:09

%S 0,0,3,18,60,214,1008,5280,29160,165840,940896,5196096,28304640,

%T 155270016,863910489,4861712448,27554100480,156728297088,892662156288,

%U 5088174124950,29045467518171,166186204664832,953309368018944,5481559804635648,31581437286776820

%N Number of 6-ary Lyndon words of length n with trace 2 and subtrace 5 over Z_6.

%C Same as the number of 6-ary Lyndon words of length n with trace 4 and subtrace 5 over Z_6.

%H Max Alekseyev, <a href="http://home.gwu.edu/~maxal/gpscripts/">PARI/GP scripts for miscellaneous math problems</a>

%H F. Ruskey <a href="http://combos.org/TSlyndonZ6">6-ary Lyndon words with given trace and subtrace</a>

%Y Cf. A074422, A074423, A074424, A074425, A074426, A074427, A074428, A074429, A074430, A074431, A074432, A074433, A074434, A074435, A074436, A074437, A074438, A074440, A074441, A074442, A074443, A074444, A074445.

%K easy,nonn

%O 1,3

%A _Frank Ruskey_ and Nate Kube, Aug 23 2002

%E Terms a(11) onwards from _Max Alekseyev_, Feb 20 2010