Number of binary Lyndon words containing n letters of each type; periodic binary sequences of period 2n with n zeros and n ones in each period.

A022553

Number of binary Lyndon words containing n letters of each type; periodic binary sequences of period 2n with n zeros and n ones in each period.

Terms

    a(0) =1a(1) =1a(2) =1a(3) =3a(4) =8a(5) =25a(6) =75a(7) =245a(8) =800a(9) =2700a(10) =9225a(11) =32065a(12) =112632a(13) =400023a(14) =1432613a(15) =5170575a(16) =18783360a(17) =68635477a(18) =252085716a(19) =930138521a(20) =3446158600a(21) =12815663595a(22) =47820414961a(23) =178987624513a(24) =671825020128

External references