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A111878
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a(n)=denominator(digamma(n+7/2)/2+ln(2)+euler_gamma/2)/15; a(n)=denominator(f(n+2)/15)=A111877(n+1)/5.
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0
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1, 7, 21, 231, 3003, 3003, 51051, 969969, 969969, 22309287, 111546435, 334639305, 9704539845, 300840735195, 300840735195, 300840735195, 11131107202215, 11131107202215, 456375395290815, 19624141997505045, 19624141997505045
(list; graph; refs; listen; history; internal format)
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