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I've been playing around with sequences lately and found a pretty evenly doubled sequence of single digit numbers:
1, 12, 30, 64, 65, 156, 175, 368, 369, 371, 752, 753, 1524, 1525, 3060, 3073, 6168, 6219, 6221, 12444, 12453, ...
Can you tell me what number comes next, and why?