Journal of Integer Sequences, Vol. 12 (2009), Article 09.8.5

Ramanujan Type Trigonometric Formulas: The General Form for the Argument 2π/7

Roman Wituła
Institute of Mathematics
Silesian University of Technology
Kaszubska 23
Gliwice 44-100


In this paper, we present many general identities connected with the classical Ramanujan equality. Moreover, we give Binet formulas for an accelerator sequence for Catalan's constant.

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(Concerned with sequences A006053 A094648.)

Received July 6 2009; revised version received December 3 2009. Published in Journal of Integer Sequences, December 3 2009.

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