E819 -- (819E)Continuatio fragmentorum ex adversariis mathematicis depromptorum
(Continuation of some fragments taken from the Mathematics day book)
They evaluate the square of the sum of reciprocals of an arithmetic sequence, as well as a power series
where all the coefficients are 0 or 1. And, as we expect in the adversarii, a couple of other things.
Originally published in Opera Postuma 1, 1862, pp. 487-518
Opera Omnia: Series 1, Volume 16, pp. 312 - 320
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