From one to twenty

1234567891011121314151617
Across
  1. 2. number 6
  2. 4. number 2
  3. 5. number 13
  4. 8. number 9
  5. 10. number 18
  6. 11. number 7
  7. 12. number 15
  8. 13. number 10
  9. 14. number 20
  10. 15. number 8
  11. 16. number 11
  12. 17. number 1
Down
  1. 1. number 16
  2. 3. number 4
  3. 5. number 12
  4. 6. number 19
  5. 7. number 5
  6. 9. number 17
  7. 12. number 14
  8. 13. number 3