SECOND GOLFING (my own discovery):

APL (Dyalog Unicode), 63 bytes

f←{⍵↑⊃,/1,¨⌽¨1,¨2⍴⍨¨1+2×1-⍨⍳1+⌈⍟⍵}

Try it online!

Explanation of golfing: The expression that was formerly subscripted does not need to be parenthesized if using ⍵↑ instead of [⍳⍵]. Savings, 2bytes.

This answer returns the entire sequence to the requested value.

This answer returns the entire sequence up to the requested value.

FIRST GOLFING (courtesy ngn):

APL (Dyalog Unicode), 65 bytes

f←{⍵↑(⊃,/1,¨⌽¨1,¨2⍴⍨¨1+2×1-⍨⍳1+⌈⍟⍵)}

Try it online!

Explanation of golfing:

[⍳⍵] is the same as [1 2 3 4 5 6 ... ⍵], 
      which is the first ⍵ items of the vector being subscripted.
      That's the same as 
⍵↑    "Take" the first ⍵ items.  Savings, 2bytes.