(1 . rest)

car -> 1
prelucrare
recursivitate cu cdr -> rest



0 1 2 3 4 5 6 7 8 9 10
+ + +
1 1 1


0 1 2

map a folosit
0 1


0 1 2 3 4 5 6 7 8
1 1 1 1 1 1 1 1 1
+
1 2 3 4 5 6 7 8 9


1 1 1 1 1 1 1
  1 1 1 1 1 1 
    1 1 1 1 1 1


(stream-car ceva) -> 4
													("build 5")
												(4 . promi)
(cons (stream-car ceva) (stream-take (stream-cdr ceva) 0))
         4					()
'(4)


2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17
2   -   -   -    -     -     -     -
  3           -                -
      5

sieve (2 3 4 5 6 7 ...)
  cons
  2
      sieve filter (%2) (3 4 5 6 7 8 9 ...)
	  sieve (3 5 7 9 11 13...)
	     cons
		 3
		     sieve filter (%3) filter (%2) (4 5 6 7 8 9 ...)
			 sieve filter (%3) (5 7 9 11 ...)
			 sieve filter (5 7 9 11 13 15 17 ...)
			 sieve (5 7 11 13 17 ...)
			    cons
				5
				...
			 (5 7 11 13 17 19 23 ...)
	  (3 5 7 11 13 17 19 23 ...)
  (2 3 5 7 11 13 17 19 23 ...)