Ref:Meditationes, L. Euler, 1776

L. Euler, `Meditationes circa singulare serierum genus,' Novi Comm. Acad. Sci. Petropol. 20 (1776), 140-186. Reprinted in Opera Omnia, ser. I, vol. 15, B. G. Teubner, Berlin, 1927, pp. 217-267.

Original paper by Euler on zeta values.