A weird pattern
Level
pending
What is next in the sequence?
1, 1, 2, 5, 14, 42, 132,?
The answer is 429.
This section requires Javascript.
You are seeing this because something didn't load right. We suggest you, (a) try
refreshing the page, (b) enabling javascript if it is disabled on your browser and,
finally, (c)
loading the
non-javascript version of this page
. We're sorry about the hassle.
1 solution
This is a famous series known as the Catalan numbers.
It uses the function 2n!/((n+1)!(n!)) or famously written as (1/(n+1))*2nCn