[seqfan] Re: A092636 primes in mod 4 classes

Charles Greathouse charles.greathouse at case.edu
Fri Sep 30 19:19:38 CEST 2011


It's a matter of definition.  If the last two primes below 10^n are 3
mod 4 then 1 mod 4, and the first following it is 3 mod 4, then is it
counted?  The author counted it; you don't.

Charles Greathouse
Analyst/Programmer
Case Western Reserve University

On Fri, Sep 30, 2011 at 12:41 PM, Richard Mathar
<mathar at strw.leidenuniv.nl> wrote:
>
> Shouldn't the count of  isolated runs of primes mod 4 ==1 in
> http://oeis.org/A092636 start 1,5,31,207,1555,12465,102704,
> with 207 instead of 208?
>
> Richard Mathar
>
>
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