Matula-Goebel numbers of unlabeled binary rooted semi-identity trees.

Terms

a(0) =1a(1) =4a(2) =14a(3) =86a(4) =301a(5) =886a(6) =3101a(7) =3986a(8) =13766a(9) =13951a(10) =19049a(11) =48181a(12) =57026a(13) =75266a(14) =85699a(15) =199591a(16) =263431a(17) =295969a(18) =298154a(19) =302426a(20) =426058a(21) =882899