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A036524
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Smallest triangle containing exactly n 7's.
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1
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78, 1770, 72771, 6787770, 37779778, 2476777771, 7477727778, 7077757275771, 27778877747778, 177775772774775, 7777755777787716, 172777077787777785
(list; graph; refs; listen; history; internal format)
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