OFFSET
1,6
COMMENTS
Same as the number of binary Lyndon words of length n with trace 0 and subtrace 0 over GF(2).
LINKS
FORMULA
EXAMPLE
a(6;0,0)=2 since the two binary Lyndon words of trace 0, subtrace 0 and length 6 are { 001111, 010111 }.
CROSSREFS
KEYWORD
easy,nonn
AUTHOR
Frank Ruskey and Nate Kube, Aug 21 2002
EXTENSIONS
Terms a(33) onward from Max Alekseyev, Apr 09 2013
STATUS
approved