1 x 2 = - 2, 2 x 2 = - 4, 3 x 2 = - 6, 4 x 2 = - 8, 5 x 2  = - 10, 6 x 2 = - 12, 7 x 2 = - 14, 8 x 2 = - 16, 9 x 2 = - 18, 10 x 2  = - 20, 11 x 2 = - 22, 12 x 2 = - 24, 13 x 2 = - 26,

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