A112231 Repeat each prime in the sequence of natural numbers.

1, 2, 2, 3, 3, 4, 5, 5, 6, 7, 7, 8, 9, 10, 11, 11, 12, 13, 13, 14, 15, 16, 17, 17, 18, 19, 19, 20, 21, 22, 23, 23, 24, 25, 26, 27, 28, 29, 29, 30, 31, 31, 32, 33, 34, 35, 36, 37, 37, 38, 39, 40, 41, 41, 42, 43, 43, 44, 45, 46, 47, 47, 48, 49, 50, 51, 52, 53, 53, 54, 55, 56, 57, 58