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.
LINKS
CROSSREFS
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