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The sum of a logarithmic harmonic series

Posted 9 years ago

If I type this into wolframAlpha

sum log(k)/(k)  for k = 2..n

then I get StieltjesGamma(1)-?_1(1+n) where it also tells me that ?_1 is the StieltjesGamma(1) function. (It's strange that it did not simplify, but OK.)

However, when I go to verify the equation at n=100, it does not work out.

StieltjesGamma(1)-StieltjesGamma(1)*(1+100)
7.2815845483676724860586375874901319137736338334337952

but

sum log(k)/k  for k = 2..100
10.553976183549153710596114240658388851398614872416869

Is this a bug? It does not make much sense to me. Any ideas what is going on?

POSTED BY: Alex Townsend
POSTED BY: Marco Thiel
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