Number of Lyndon words appearing as n-th degree terms in Baker-Campbell-Hausdorff series.
A220587
Number of Lyndon words appearing as n-th degree terms in Baker-Campbell-Hausdorff series.
Terms
- a(0) =2a(1) =1a(2) =2a(3) =1a(4) =6a(5) =5a(6) =18a(7) =17a(8) =55a(9) =55a(10) =186a(11) =185a(12) =630a(13) =629a(14) =2181a(15) =2181a(16) =7710a(17) =7709a(18) =27594a(19) =27593a(20) =99857a(21) =99857
External references
- oeis: A220587