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A063580
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Smallest power of 4 having just n 5's in its decimal representation.
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0
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1, 4, 8, 37, 38, 34, 72, 54, 71, 89, 99, 136, 105, 134, 151, 172, 206, 159, 202, 214, 156, 304, 274, 278, 253, 281, 268, 358, 326, 375, 389, 345, 424, 429, 460, 488, 449, 484, 466, 521, 531, 544, 568, 556, 638, 540, 590, 547, 508, 677, 606
(list; graph; refs; listen; history; internal format)
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