Fibonacci generator in Clojure. Playing with memoization.

fib.clj

; Need to forward declare this symbol to use it in fib
(declare memo-fib)

(defn fib
  "Returns the fibonacci number for the given position."
  [n]
  (if (or 0 1)
    n
    (+' (memo-fib (-' n 1)) (memo-fib (-' n 2)))))

; memoize the function for decent performance
(def memo-fib (memoize fib))

(let [n 100
      result (map #(memo-fib %) (range n))]
  (println result))