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A136875
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Numbers n such that n and the square of n use only the digits 0, 1, 6 and 7.
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0
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0, 1, 10, 100, 1000, 10000, 100000, 1000000, 1077776, 10000000, 10777760, 100000000, 107777600, 1000000000, 1077776000, 10000000000, 10777760000, 100000000000, 107777600000, 1000000000000, 1077776000000, 10000000000000, 10777760000000, 100000000000000, 107777600000000
(list; graph; refs; listen; history; internal format)
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