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A172503
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a(n) = numerator of fraction a/b, where gcd(a, b) = 1, whose decimal representation has the form (n).(n)(n)(n)... with period (n).
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2
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10, 20, 10, 40, 50, 20, 70, 80, 10, 1000, 100, 400, 1300, 1400, 500, 1600, 1700, 200, 1900, 2000, 700, 200, 2300, 800, 2500, 2600, 300, 2800, 2900, 1000, 3100, 3200, 100, 3400, 3500, 400, 3700, 3800, 1300, 4000, 4100, 1400, 4300, 400, 500, 4600, 4700, 1600, 4900, 5000
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