Revision 242fd7db-6240-41e3-8dea-cf5a85d9d575 - Code Golf Stack Exchange

#JavaScript (ES6), 31 bytes

<!-- language-all: lang-javascript -->

 f=n=>n&&n+' '+f(n&1?n>>1:n*3+1)

[Try it online!][TIO-jo3c4g7x]

[JavaScript (Node.js)]: https://nodejs.org
[TIO-jo3c4g7x]: https://tio.run/##y0osSyxOLsosKNHNy09J/f8/zTbP1i5PTS1PW11BXTtNI0/N0D7Pzs7QKk/LWNtQ839yfl5xfk6qXk5@ukaahqGmJheqiBGGiDGGiKEBppCJpuZ/AA "JavaScript (Node.js) – Try It Online"