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A137047
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Numbers n such that n and the square of n use only the digits 1, 4, 5, 6 and 8.
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1
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1, 4, 8, 41, 81, 816, 6441, 6454, 11881, 64466, 64546, 641441, 644581, 684581, 6454581, 8114466, 11881141, 64541141, 64661881, 66448884, 68444641, 81556184, 644658684, 644861881, 644868641, 646618641, 664414454, 664564184, 681585546, 811488858, 815141488, 6414448884, 6445668816, 6448618546, 6644141541, 64465581141, 64548885884
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