Return the 3n+1 sequence for n
Back to basics 6 - Column Vector
Back to basics 23 - Triangular matrix
(Linear) Recurrence Equations - Generalised Fibonacci-like sequences
Repopulate the City
Find a subset that divides the vector into equal halves
Spot the rectangle (Part 2)
Cell Counting: How Many Draws?
Give a matrix that matches itself when rotated
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