project-euler/0001/main.lisp

(defun genlist (n)
  (defun impl (x lst)
    (if (> x n)
        (reverse lst)
        (impl (+ 1 x) (cons x lst))))
  (impl 1 '()))

(let ((sum 0))
  (loop for x in (genlist 999)
	do (if (or (equal 0 (mod x 3))
		   (equal 0 (mod x 5)))
	       (setf sum (+ sum x))))
  (print sum))