2➗2, 1, 4➗2, 2, 6➗2, 3, 8➗2, 4, 10➗2, 5, 12➗2, 6, 14➗2, 7, 16➗2, 8, 18➗2, 9, 20➗2, 10, 22➗2, 11, 24➗2, 12.

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