Matula-Goebel signatures for plane binary trees encoded by A014486.

Terms

a(0) =1a(1) =4a(2) =14a(3) =14a(4) =86a(5) =86a(6) =49a(7) =86a(8) =86a(9) =886a(10) =886a(11) =454a(12) =886a(13) =886a(14) =301a(15) =301a(16) =301a(17) =886a(18) =886a(19) =301a(20) =454a(21) =886a(22) =886a(23) =13766a(24) =13766a(25) =6418a(26) =13766a(27) =13766a(28) =3986a(29) =3986