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A137065
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Numbers n such that n and the square of n use only the digits 1, 6, 7, 8 and 9.
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1
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1, 9, 786, 881, 887, 7867, 8167, 8887, 81619, 81791, 81969, 88776, 88869, 88987, 781791, 819687, 876167, 988776, 988869, 7866187, 7866881, 8168119, 8179119, 8768619, 8819687, 8881886, 78177867, 81718796, 81968176, 87817891, 88191786, 88191791, 88196819, 88711886, 88768619, 88817891, 88866187, 88876987, 781779891, 786117796
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