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A136952
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Numbers n such that n and the square of n use only the digits 0, 4, 5, 7 and 9.
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1
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0, 7, 70, 97, 700, 970, 997, 7000, 9700, 9747, 9970, 9997, 70000, 70997, 75997, 97000, 97470, 99700, 99970, 99997, 700000, 709970, 709997, 759970, 759997, 970000, 974700, 997000, 999700, 999970, 999997, 7000000, 7050497, 7099700, 7099970, 7099997, 7450497, 7599700, 7599970, 7599997, 9700000, 9747000, 9970000, 9979757, 9997000
(list; graph; refs; listen; history; internal format)
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