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3, 15, 45, 405, 2025, 6075, 91125, 1549125, 13942125, 23236875, 534448125, 64133775, 1731611925, 50216745825, 753251187375, 2259753562125, 7683162111225, 69148459001025, 207445377003075, 1037226885015375, 14866918685220375, 669011340834916875
(列表;图表;参考;听;历史;文本;内部格式)
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