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Number of 6-ary Lyndon words of length n with trace 1 and subtrace 2 over Z_6.
22

%I #11 May 03 2019 07:20:56

%S 0,0,3,12,36,162,1008,6048,33048,176256,940896,5038848,27433728,

%T 152845056,863910489,4899999744,27770211072,157340548224,892662156288,

%U 5078255822436,28988793435209,166023914360832,953309368018944,5484237660094464,31596861676172076

%N Number of 6-ary Lyndon words of length n with trace 1 and subtrace 2 over Z_6.

%C Same as the number of 6-ary Lyndon words of length n with trace 5 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 - 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