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A025541
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a(n) = (1/C(0,0) + 1/C(2,1) + ... + 1/C(2n,n))*L, where L = LCM{C(0,0), C(2,1),..., C(2n,n)}.
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0
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1, 3, 10, 103, 727, 2186, 24061, 625719, 625719, 10637349, 202110261, 202110426, 4648540788, 23242705227, 69728116682, 4044230782571, 125371154379821, 125371154410761, 125371154418717, 4638732713568111, 4638732713587491
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