I've been looking for something like this! I'm trying to play around with it but can't seem to get the selector right. How do I grab a table `td` by its nth sel

I've been looking for something like this! I'm trying to play around with it but can't seem to get the selector right. How do I grab a table `td` by its nth selector (tried `td:nth-of-type(n)` to no avail)?