Crate catalan

Structs

• FullBinaryTrees
  A cache for full binary trees
• OperatorPermutation
• ReversePolishNotation

Enums

• BinaryNode
  A element in full binary tree Can be a atom or a node
• ExpressionNode

Functions

• catalan_tree3
• catalan_tree4
• catalan_tree5
• catalan_tree6