[seqfan] Re: A proposed sequence

Chris Thompson cet1 at cam.ac.uk
Thu Feb 23 16:17:35 CET 2017


On Feb 22 2017, David Newman wrote:

> The logarithmic integral of x, minus the number of primes less than x,
> is a number which appears in statements of the Riemann hypothesis.
> Would it be nice to have a sequence of the integer parts of these
> numbers?  The numbers I've gotten  are:
>
> 0, 0, 0, 0, 1, 0, 1, 1, 2, 1, 2, 1, 1, 2, 2, 1, 2, 1, 1, 2, 2, 1, 2, \
> 2, 2, 3, 3, 2, 3, 2, 2, 2, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 3, 3, 2, \
> 2, 3, 3...

On Feb 23 2017, Neil Sloane wrote:

>David Newman, A047783 gives floor(Li(n)), but we should definitely have
>your version too - please submit it!

Make sure to include a comment telling us exactly where the first negative
entry occurs... :-)

-- 
Chris Thompson
Email: cet1 at cam.ac.uk





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