G-Fact 9
The number of structurally different Binary Trees with n nodes is Catalan number Cn = (2n)!/(n+1)!*n!
References:
http://mathworld.wolfram.com/BinaryTree.html
The number of structurally different Binary Trees with n nodes is Catalan number Cn = (2n)!/(n+1)!*n!
References:
http://mathworld.wolfram.com/BinaryTree.html