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A137049
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Numbers n such that n and the square of n use only the digits 1, 4, 5, 7 and 8.
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1
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1, 88, 888, 4141, 7471, 7588, 8471, 8878, 418878, 747588, 758141, 4145771, 8478141, 41458141, 41818878, 41855488, 74485888, 718158141, 744411478, 747541141, 878148141, 887574141, 888154141, 4144585478, 7444115471, 8454854141, 8881151478, 74711811488, 75877847588, 84745157471, 84785445771, 88155858878, 88157571888
(list; graph; refs; listen; history; internal format)
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