A small function for calculating Catalan numbers.
> const catalan = require('catalan')
> catalan(5)
42
> catalan(-1)
NaNsemibran/narayana- calculate Narayana numbers
A small function for calculating Catalan numbers.
> const catalan = require('catalan')
> catalan(5)
42
> catalan(-1)
NaNsemibran/narayana - calculate Narayana numbers