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A346464
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a(n) = 6 * GaussBinomial(2*n, 2, 2) * Bernoulli(2*n, 1).
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3
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0, 1, -7, 93, -2159, 79205, -4243431, 313117357, -30459187423, 3777547352949, -581776592603735, 108932905225448381, -24370170371013413967, 6419958293615735090053, -1967044830254804722091719, 693575524342402846796188365, -278846808098157253796358662591
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OFFSET
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0,3
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LINKS
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FORMULA
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a(n) = -2*n*(4^n - 2)*(4^n - 1)*zeta(1 - 2*n) for n >= 1.
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MAPLE
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a := n -> `if`(n = 0, 0, -2*n*(4^n - 2)*(4^n - 1)*Zeta(1 - 2*n)):
seq(a(n), n = 0..16);
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MATHEMATICA
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Table[6 QBinomial[2 n, 2, 2] BernoulliB[2 n, 1], {n, 0, 16}]
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CROSSREFS
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KEYWORD
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sign
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AUTHOR
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STATUS
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approved
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