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A025563
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a(n) = (1/1 + 1/(n-1) + ... + 1/C(n-[ n/2 ],[ n/2 ]))*L, where L = LCM{1, n-1, ..., C(n-[ n/2 ],[ n/2 ])}.
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0
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1, 2, 3, 7, 19, 71, 91, 485, 1195, 2825, 3379, 30311, 35440, 386765, 444215, 381599, 864173, 12849325, 14382075, 242411355, 268746270, 241122575, 265178965, 5523031235, 6032611435, 27525151138, 29887618948, 82357018570, 88965868595
(list; graph; refs; listen; history; internal format)
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