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A074431
Number of 6-ary Lyndon words of length n with trace 1 and subtrace 3 over Z_6.
21
0, 0, 1, 9, 60, 270, 1157, 5616, 29160, 157464, 883872, 5038848, 28421280, 158130514, 877515379, 4897760256, 27554100480, 156116108160, 889046473445, 5077739844402, 29045467518171, 166351313967709, 954240788994048, 5484237660094464, 31581615565250142
OFFSET
1,4
COMMENTS
Same as the number of 6-ary Lyndon words of length n with trace 5 and subtrace 3 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