Fibonacci y Factorial

(define (factorial n)
  (cond
    ((= n 0) 1)
    (else
     (* n (factorial (- n 1)))
    )
   )
)

;(factorial 6)

(define (fibonacci n)
  (cond
    ((= n 0) 0)
    ((= n 1) 1)
    (else
     (+ (fibonacci (- n 1)) (fibonacci (- n 2)))
    )
  )
)

(fibonacci 17)