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A137097
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Numbers n such that n and the square of n use only the digits 2, 4, 5, 7 and 8.
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1
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2, 5, 22, 28, 85, 88, 278, 472, 478, 522, 528, 888, 2878, 5278, 7588, 27485, 47485, 74528, 87878, 242585, 275472, 522282, 745485, 885582, 2782485, 2784878, 2878278, 8845778, 8874528, 24257485, 27545522, 27547282, 28787588, 88457588, 88725828, 242454585, 242544582, 242587878, 274745778, 275424722, 474852878, 475244722, 758585828, 885845522
(list; graph; refs; listen; history; internal format)
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