Number of possible circular rhymes of n strophes.

Terms

a(0) =1a(1) =2a(2) =3a(3) =5a(4) =9a(5) =11a(6) =14a(7) =18a(8) =23a(9) =26a(10) =29a(11) =30a(12) =33a(13) =35a(14) =39a(15) =41