Minggatu-Catalan Number
First discovered by the Chinese Mathematician Minggatu 明安图 (清 康熙, 1730), later by the French (né Belgian) Ecole Polytechnique mathematicianEugène Charles Catalan (1814 – 1894).
Ref:
1. History:
2. Proof of Minggatu Catalan numbers
3. Monoid
4. Kleene Star
