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A048346
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a(n)^2 is the smallest square containing exactly n 1's in its decimal notation.
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1
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0, 1, 11, 109, 1054, 3381, 10541, 105414, 414139, 1055041, 10252371, 78173596, 334082481, 1187901979, 1055036071, 33333407869, 105409293239
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