Number of anti-transitive rooted trees with n nodes.

Terms

a(0) =1a(1) =1a(2) =2a(3) =3a(4) =7a(5) =14a(6) =36a(7) =83a(8) =212a(9) =532a(10) =1379a(11) =3577a(12) =9444a(13) =25019a(14) =66943a(15) =179994a(16) =487031a(17) =1323706a(18) =3614622a(19) =9907911a(20) =27258492a(21) =75234056a(22) =208273924a(23) =578141227a(24) =1608902054a(25) =4487770552a(26) =12544890518a(27) =35137366032a(28) =98600552639a(29) =277167751387