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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.
Lol! I felt the same.
Gauss is turning in his grave BUT it works.
I didn't want to feel cheesy by googling "pyramid of odd numbers" and being given a solution, but after one hour of struggle and coming to a different solution... This is borderline insulting.
And here I am, slicing up the array like a madman with a rusty cleaver...
This is clearly sorcery