prime number races

[N. J. A. Sloane]

If you search in the OEIS for   prime  race   you get
30 matches. A007350 has the Granville reference
and web page that i was going to tell you about

Also the famous Rubinstein-Sarnak article

Best of all, A007355 has exactly what you want:

%I A007352 M2191
%S A007352 2,608981813029,608981813357,608981813707,608981813717,608981819119,
%T A007352 608981819273,608981819437,608981820869,608981836423,608981836481
%N A007352 Where prime race 3n-1 vs. 3n+1 changes leader.
%D A007352 A. Granville and G. Martin, Prime number races, Amer. Math. Monthly, 113 (No. 1, 2006), 1-33.
%H A007352 Greg Martin, <a href="http://www.math.umn.edu/~focm/c_/Martin.pdf">Foundations of Computational Mathematics</a>.
%H A007352 A. Granville and G. Martin, <a href="http://www.arXiv.org/abs/math.NT/0408319">Prime number races</a>
%K A007352 nonn
%O A007352 1,1
%A A007352 njas, Mira Bernstein, Robert G. Wilson v (rgwv(AT)rgwv.com)

Neil