Like this?

  sequence { for (x in 0..<10) for (y in 0..<10) yield(x*y) }.toList()

Now, technically, Kotlin doesn't have list comprehensions, only the equivalent of generator expressions in Python, so you have to tack an extra `.toList()` on at the end if you want a list, but you can write pretty much any for comprehension in Python in a similar way in Kotlin.