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Collections are a way for you to organize kata so that you can create your own training routines. Every collection you create is public and automatically sharable with other warriors. After you have added a few kata to a collection you and others can train on the kata contained within the collection.
Get started now by creating a new collection.
Doesn't this go into an infinite loop if I put in ) or any negative number?
if n == 0 then we call 0 + triangular(-1) and so on and so forth.