Number of stable trees with n nodes.

Terms

a(0) =1a(1) =1a(2) =1a(3) =1a(4) =2a(5) =4a(6) =8a(7) =17a(8) =37a(9) =85a(10) =196a(11) =469a(12) =1134a(13) =2799a(14) =6975a(15) =17628a(16) =44903a(17) =115497a(18) =299089a(19) =780036a(20) =2045924a(21) =5396078a(22) =14299878a(23) =38067356a(24) =101748748a(25) =272995157a(26) =735004112a(27) =1985356350a(28) =5378958683a(29) =14614641597