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A074440
Number of 6-ary Lyndon words of length n with trace 3 and subtrace 0 over Z_6.
21
1, 1, 3, 9, 25, 126, 900, 5832, 33045, 178459, 952560, 5080293, 27546779, 153055008, 863910327, 4897760256, 27757515151, 157292585046, 892526107392, 5077997833419, 28988793431460, 166026726038016, 953325512487936, 5484299577441192, 31597040041716690
OFFSET
1,3
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