Number of complete necklace compositions of n.

Terms

a(0) =1a(1) =1a(2) =2a(3) =2a(4) =4a(5) =7a(6) =12a(7) =19a(8) =41a(9) =71a(10) =141a(11) =255a(12) =509a(13) =924a(14) =1882a(15) =3395a(16) =6838a(17) =12715a(18) =25233a(19) =47049