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A290534
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Denominator of 2*n*(2*n+1) B_{2*n}, where B_n are the Bernoulli numbers.
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1
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1, 1, 3, 1, 5, 3, 35, 1, 15, 7, 11, 3, 91, 1, 15, 77, 85, 3, 8645, 1, 33, 1, 23, 3, 1105, 11, 15, 133, 145, 3, 31031, 1, 51, 161, 5, 33, 319865, 1, 15, 7, 7667, 3, 16211, 1, 345, 6479, 235, 3, 7735, 1, 33, 7, 53, 3, 319865, 23, 7395, 7, 295, 3, 7055321, 1, 3, 817
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OFFSET
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0,3
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COMMENTS
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In 1997, Matiyasevich found the following identity;
(n+2) * Sum_{k=2..n-2} B_k*B_{n-k} - 2 * Sum_{k=2..n-2} binomial(n+2, k)*B_k*B_{n-k} = n*(n+1)*B_n for n > 3.
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LINKS
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CROSSREFS
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KEYWORD
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nonn,frac
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AUTHOR
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STATUS
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approved
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