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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.
It will be easier later :)
Start by looking for the dependence of the first number of the pyramid row on the number of this row.
If you get this formula, then you will determine the number for the beginning of the cycle, in which you will need to add up all the odd numbers of this series.
You say 'cheats', I say 'research'.