Using f\pipe() function:

1. naturalNumbers -> 1
2. naturalNumbers -> 2
3. \nspl\a\lazy\filter -> 2
4. \nspl\a\lazy\take -> 2
5. \nspl\a\lazy\map -> 4

Next value is 4 

6. naturalNumbers -> 3
7. naturalNumbers -> 4
8. \nspl\a\lazy\filter -> 4
9. \nspl\a\lazy\take -> 4
10. \nspl\a\lazy\map -> 16

Next value is 16 

11. naturalNumbers -> 5
12. naturalNumbers -> 6
13. \nspl\a\lazy\filter -> 6
14. \nspl\a\lazy\take -> 6
15. \nspl\a\lazy\map -> 36

Next value is 36 

The same solution with chaining:

16. naturalNumbers -> 1
17. naturalNumbers -> 2

Next value is 4 

18. naturalNumbers -> 3
19. naturalNumbers -> 4

Next value is 16 

20. naturalNumbers -> 5
21. naturalNumbers -> 6

Next value is 36