1+1, 2, 2+2, 4, 3+3, 6, 4+4, 8, 5+5, 10, 6+6, 12, 7+7, 14, 8+8, 16, 9+9, 18, 10+10, 20, 11 + 11, 22, 12 + 12, 24, 13 + 13, 26, 14 + 14, 28, 15 + 15, 30, 16 + 16, 32, 32 + 32, 64, 25 + 25, 50, 50 + 50, 100, 45 + 45, 90, 60 + 60, 120

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