Sequence, Prime Number. 1, 2. 2, 3. 3, 5. 4, 7. 5, 11. 6, 13. 7, 17. 8, 19. 9, 23. 10, 29. 11, 31. 12, 37. 13, 41. 14, 43. 15, 47. 16, 53. 17, 59. 18, 61.
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