2, 4, 6, 8, _, 9, 10, 12, 31, 29, 27, 25, 23, _, 22, 21, 20, 79, 90, _ , 112, 123, 99, 101, 109, 19, 28, 37, 45, 55, add 5, minus 9, add 9, minus 5.

Math 3: Continuous and Repeating Pattern

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