Output the nth Even Perfect Number
Jelly, 7 bytes

6Æṣ=$#Ṫ


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How it works

6Æṣ=$#Ṫ  Main link. Argument: n

6        Set the return value to 6.
     #   Execute the link to the left with argument k = 6, 7, 8, ... until n
         values of k result in a truthy value. Yield the array of matches.
    $        Combine the two links to the left into a monadic chain.
 Æṣ              Compute the sum of k's proper divisors.
   =             Compare the result with k.
      Ṫ  Tail; extract the last match.