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A137014
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Numbers n such that n and the square of n use only the digits 1, 2, 6, 7 and 8.
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1
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1, 11, 26, 261, 276, 826, 881, 1126, 1276, 2681, 8881, 78181, 78881, 82261, 88776, 161761, 261126, 277826, 1128126, 1271881, 1618276, 7866881, 8226276, 8287811, 8878126, 11281276, 12722681, 26781761, 27717826, 78221881, 78222681, 78878881, 161767681, 161777261, 166182811, 167812776, 261278181, 266678126, 266876126, 268116881
(list; graph; refs; listen; history; internal format)
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