Too many loops and a long solution. But my brain broke down when trying to do it in 4- or 5-dimensional arrays :')
Math with Roman Numerals
Sum of first n terms of a harmonic progression
Cubic Integer Constrained Solution
Divide elements by sum of elements
Find a real root of a quintic function
Van Eck's Sequence's nth member
Check if the input is an interprime
Recaman Sequence - II
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