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A137028
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Numbers n such that n and the square of n use only the digits 1, 3, 4, 7 and 8.
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1
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1, 38, 88, 1188, 4141, 8878, 11478, 18471, 33878, 183878, 844878, 887771, 1347141, 3381378, 33883878, 43344878, 88811471, 177317438, 178374141, 333374141, 338841141, 344743878, 844877141, 887377438, 3334348188, 3441183188, 8817473471, 11483831378, 13347183878, 13371137378, 13484747378, 17713783188, 17744811471
(list; graph; refs; listen; history; internal format)
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