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A074432
Number of 6-ary Lyndon words of length n with trace 1 and subtrace 4 over Z_6.
21
0, 1, 3, 6, 25, 162, 1008, 5832, 33048, 180662, 952560, 5038848, 27433728, 153055008, 863910489, 4895520768, 27757515151, 157340548224, 892662156288, 5077997833419, 28988793435209, 166029537715200, 953325512487936, 5484237660094464, 31596861676172076
OFFSET
1,3
COMMENTS
Same as the number of 6-ary Lyndon words of length n with trace 5 and subtrace 4 over Z_6.
KEYWORD
easy,nonn
AUTHOR
Frank Ruskey and Nate Kube, Aug 23 2002
EXTENSIONS
Terms a(11) onwards from Max Alekseyev, Feb 20 2010
STATUS
approved