https://en.wikipedia.org/wiki/Collatz_conjecture
cargo build --release
./target/release/collatz --help
./target/release/collatz 0 10000
display ./output.png
https://en.wikipedia.org/wiki/Collatz_conjecture
cargo build --release
./target/release/collatz --help
./target/release/collatz 0 10000
display ./output.png