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A137102
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Numbers n such that n and the square of n use only the digits 2, 4, 6, 7 and 9.
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1
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2, 7, 26, 27, 264, 277, 474, 792, 964, 4762, 6926, 22277, 26962, 27924, 49262, 49426, 49474, 49777, 69262, 264474, 269777, 474262, 476962, 494262, 494462, 494464, 497262, 497662, 499474, 692262, 692277, 962924, 972764, 2779262, 4767277, 4769462, 4772277, 4944464, 4946662, 4994777, 4996926, 4996962, 4997262, 4997764, 9729464, 9964674
(list; graph; refs; listen; history; internal format)
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