This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A119297 #25 May 02 2019 15:56:11
%S A119297 0,10,315,3824,47269,560677,7079879,79433407,887292243,9778050835,
%T A119297 110518283071,1198946387631
%N A119297 Total number of 6's digits in the first 10^n primes.
%e A119297 At a(2)=10 there are 10 6's digits in the first 10^2 primes.
%p A119297 A119297 := proc(n) option remember: local k,s,lim: if(n=0)then return 0:fi: lim:=10^n: s:=procname(n-1): for k from 10^(n-1)+1 to lim do s:=s+nops([SearchAll("6",convert(ithprime(k),string))]): od: return s: end: seq(A119297(n),n=1..4); # _Nathaniel Johnston_, May 09 2011
%t A119297 Table[Count[IntegerDigits[Prime[Range[10^n]]], 6, 2], {n, 6}] (* _Robert Price_, May 02 2019 *)
%Y A119297 Cf. A119290, A119291, A119292, A119293, A119294, A119295, A119296, A119298, A119299, A119300.
%K A119297 more,nonn,base
%O A119297 1,2
%A A119297 _Enoch Haga_, May 13 2006
%E A119297 Offset changed from 0 to 1 by _Nathaniel Johnston_, May 09 2011
%E A119297 a(8)-a(11) from _Robert Price_, Nov 05 2013
%E A119297 a(12) from _Marek Hubal_, Mar 04 2019