Try running it in tubowarp with a custom stage size. This will(should) still work properly
For an odd number, you multiply it by 3 and add 1. For an even number, you divide by two. The Collatz Conjecture says that if you keep taking the result, as long as you start with any positive number, you will always get into an infinite loop of 4, 2, 1, 4, 2, 1...