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A036516
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Smallest square containing exactly n 9's.
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2
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9, 3969, 29929, 1999396, 299739969, 2909199969, 19299599929, 909995799969, 9499999990849, 999999202999696, 9969959993997969, 90949999999997329, 9199999971969929929, 199999969997999200969, 19997911999199999979409
(list; graph; refs; listen; history; internal format)
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