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A136980
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Numbers n such that n and the square of n use only the digits 1, 2, 3, 6 and 8.
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1
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1, 6, 11, 111, 261, 8131, 36361, 116881, 162261, 163361, 183881, 362131, 1166881, 1366881, 1616361, 1683111, 2612131, 3366361, 3636361, 6218381, 11666881, 16316361, 28863881, 28868361, 36223361, 112322131, 116666881, 116883131, 162383131, 168131861, 168282111, 261282631, 333636361, 362881361, 618233881, 816163361, 826633131
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