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Number of 6-ary Lyndon words of length n with trace 0 and subtrace 2 over Z_6.
21

%I #11 May 03 2019 07:20:32

%S 0,1,2,6,36,240,1296,6312,31824,165840,883872,4861056,27433728,

%T 155696585,878719104,4938274944,27770211072,156752183808,889181991936,

%U 5067822213734,28987320651922,166186204664832,954240788994048,5486884531697664,31596861676172076

%N Number of 6-ary Lyndon words of length n with trace 0 and subtrace 2 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, A074425, A074426, A074427, A074428, A074429, A074430, A074431, A074432, A074433, A074434, A074435, A074436, A074437, A074438, A074439, 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