Number of classes of compositions of n equivalent under reflection or cycling.

Terms

a(0) =1a(1) =2a(2) =3a(3) =5a(4) =7a(5) =12a(6) =17a(7) =29a(8) =45a(9) =77a(10) =125a(11) =223a(12) =379a(13) =686a(14) =1223a(15) =2249a(16) =4111a(17) =7684a(18) =14309a(19) =27011a(20) =50963a(21) =96908a(22) =184409a(23) =352697a(24) =675187a(25) =1296857a(26) =2493725a(27) =4806077a(28) =9272779a(29) =17920859