Number of 1-sided polycairos with n cells.

Terms

a(0) =1a(1) =3a(2) =8a(3) =31a(4) =103a(5) =401a(6) =1537a(7) =6157a(8) =24748a(9) =101291a(10) =417374a(11) =1735847a(12) =7261892a(13) =30561122a(14) =129215115