Number of unicursal stars with n vertices.

Terms

a(0) =0a(1) =0a(2) =1a(3) =1a(4) =5a(5) =19a(6) =112a(7) =828a(8) =7441a(9) =76579a(10) =871225a(11) =10809051a(12) =144730446a(13) =2079635889a(14) =31912025537a(15) =520913578812