Catalan numbers for triangulations gambler’s ruin binary…
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Catalan numbers for
- triangulations
- gambler’s ruin
- binary trees
- trees
…from the Flajolet/Sedgewick coursera analysis of algorithms
in R:
catalan <- function(n) {
if(n
(This is slow above catalan(10) though, so here’s a memoised version. Then if you want to run above catalan(250) you’ll need to adjust options(expressions=5e3) to something higher; otherwise the nesting of calls goes too deep.)
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