Ramanujan's Interpolation Formula
 |  |  | (1) |
 | |  | (2) |
where
is the Dirichlet Lambda Function and 
is the Gamma Function. Equation (2) isobtained from (1) by defining | (3) |
References
Hardy, G. H. Ramanujan: Twelve Lectures on Subjects Suggested by His Life and Work, 3rd ed. New York: Chelsea, pp. 15 and 186-195, 1959.
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