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A136934
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Numbers n such that n and the square of n use only the digits 0, 3, 4, 7 and 9.
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1
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0, 3, 7, 30, 70, 97, 300, 700, 970, 997, 3000, 7000, 9700, 9970, 9997, 30000, 70000, 97000, 99700, 99970, 99997, 300000, 700000, 970000, 997000, 999700, 999970, 999997, 3000000, 3074003, 7000000, 9700000, 9970000, 9997000, 9999700, 9999970, 9999997, 30000000, 30740030, 70000000, 97000000, 99700000, 99970000, 99997000, 99999700, 99999970
(list; graph; refs; listen; history; internal format)
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