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Sequences that converge to a generalization of Ioachimescu’s constant. (English) Zbl 1265.40014

Summary: We consider a generalization of Ioachimescu’s constant as the limit \(\mathcal I(a;s)\) of the sequence \(\left(\frac 1{a^s} +\frac 1{(a+1)^s} +...+\frac 1{(a+n-1)^s}-\frac 1{1-s} ((a+n-1)^{1-s}-a^{1-s})\right)_{n\in\mathbb N}\), where \(a\in (0,+\infty)\) and \(s\in (0,1)\).
The purpose of this paper is to give some sequences that converge quickly to \(\mathcal I(a;s)\).

MSC:

40A25 Approximation to limiting values (summation of series, etc.)
11Y60 Evaluation of number-theoretic constants