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# AppleScript, 264 bytes

Sue me. It works.

```
set n to text returned of (display dialog "" default answer "") as number
set o to ""
repeat with i from 1 to n
   repeat (n-i) times
      set o to o&" "
   end repeat
   repeat i times
      set o to o&"/"
   end repeat
   repeat i times
      set o to o&"\\"
   end repeat
   set o to o&"\n"
end repeat
```