This is the simple but impossible equation known as the collatz Conjecture. When you input a number this equation applies two rules, if the number is odd multiply it by three and add one. The second rule is when the number is even, divide by 2. So far, no matter what, it will always get to one.
Thanks to Veritasium for inspiring me and teaching me about it! Please check him out on YouTube! https://m.youtube.com/watch?v=094y1Z2wpJg Thanks to @jpayer123 for the great number display!