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A137147
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Numbers n such that n and the square of n use only the digits 5, 6, 7, 8 and 9.
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1
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76, 87, 766, 887, 7666, 8887, 9786, 76587, 76666, 87576, 759576, 766666, 869866, 869867, 886886, 888587, 988866, 7666666, 8766867, 8885887, 76587576, 76666666, 76789686, 86998666, 87565786, 87685676, 88766867, 97759786, 97957576, 766666666, 875765766, 886885887, 887579686, 977699687, 987759576, 987859786, 998977867, 999788866
(list; graph; refs; listen; history; internal format)
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