The Hailstone sequence 🌨️ follows a simple pattern but behaves as unpredictably as hailstones in a cloud. Every starting number seems to reach one eventually, but no one knows if this is always true! Learn more about this sequence at math.fit/hailstone

@MathigonOrg Very nice ! The whole "Special sequences" course is cool. FYI : in France we call the "Hailstone sequence" the Collatz sequence. About the Sieve of Eratosthenes, I like to present it as a 6 column table to see and understand why the primes are necessarily +/-1 mod 6.

@MathigonOrg Lesson plan for today sorted 🫶🏼