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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.
My test case #3 example showed series_sum(6) = "1.39"
Pretty sure it was supposed to be series_sum(3), or = "1.63". Not that it held me back from getting it correct, just noticed.. back to the 8kyu's for me for awhile. Thanks for the challenge!
Wow.. I just spent a whole day and had to declare like 5 variables to use my limited abilities to complete this finally. This version is beautiful.