%I #13 Feb 16 2025 08:32:52
%S 2,7,47,309,2412,19622,166212,1440496,12712315,113764040,1029518338,
%T 9401997001
%N Number of primes of the form 5k+2 less than 10^n.
%C Computed by _T. D. Noe_, Dec 19 2003.
%H Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/ModularPrimeCountingFunction.html">Modular Prime Counting Function</a>.
%Y Cf. A045380.
%K nonn,more,changed
%O 1,1
%A _Eric W. Weisstein_, Dec 19 2003
%E a(10) from _Robert G. Wilson v_, Dec 22 2003
%E a(11)-a(12) from _Amiram Eldar_, Apr 12 2022