Number of 6-ary Lyndon words with trace 0 mod 6.

Terms

a(0) =1a(1) =2a(2) =11a(3) =51a(4) =259a(5) =1282a(6) =6665a(7) =34938a(8) =186612a(9) =1007510a(10) =5496925a(11) =30231741a(12) =167444795a(13) =932900050a(14) =5224277345a(15) =29386526544a(16) =165947641615a(17) =940369781244