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A048356
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a(n) is base of smallest triangle containing exactly n 1's.
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0
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1, 18, 58, 458, 1541, 6018, 47141, 149406, 471404, 4756366, 15563541, 149075893, 149004101, 149071198, 14907133333, 47322533981
(list; graph; refs; listen; history; internal format)
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