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A036514
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Smallest square containing exactly n 7's.
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2
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576, 5776, 179776, 12787776, 77774761, 7907477776, 77770707876, 4477777637776, 77777477275716, 3777771174707776, 76978737777779776, 276767777777770756, 3777077879777771776, 477772772701777877776, 39877777877357777777476
(list; graph; refs; listen; history; internal format)
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