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Sums of products involving power sums of $\varphi(n)$ integers (1306.5848v1)

Published 25 Jun 2013 in math.NT

Abstract: A sequence of rational numbers as a generalization of the sequence of Bernoulli numbers is introduced. Sums of products involving the terms of this generalized sequence are then obtained using an application of the Fa`a di Bruno's formula. These sums of products are analogous to the higher order Bernoulli numbers and are used to develop the closed form expressions for the sums of products involving the power sums $\displaystyle \Psi_k(x,n):=\sum_{d|n}\mu(d)dk S_k(\frac{x}{d}), n\in\mathbb{Z}+$ which are defined via the M\"obius function $\mu$ and the usual power sum $S_k(x)$ of a real or complex variable $x.$ The power sum $S_k(x)$ is expressible in terms of the well known Bernoulli polynomials by $\displaystyle S_k(x):=\frac{B_{k+1}(x+1)-B_{k+1}(0)}{k+1}.$

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