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 A228418 #21 Mar 19 2024 12:28:26
%S A228418 1,10,90,719,6696,60845,554933,4742037,43331008,392875212,3573268469,
%T A228418 31207451849,282765603085
%N A228418 Count of the first 10^n primes which do not contain the digit 6.
%F A228418 a(n) <= 9^n. - _Charles R Greathouse IV_, May 21 2014
%e A228418 a(1) = 10 since there are 10 primes in the first 10 (through 29) that do not contain a 6. Namely: 2, 3, 5, 7, 11, 13, 17, 19, 23, 29.
%t A228418 Table[Length[Select[Range[10^n], DigitCount[Prime[#], 10, 6] == 0 &]], {n, 0, 5}] (* _Robert Price_, Mar 23 2020 *)
%Y A228418 Cf. A231412, A228413-A228421, A097952, A091634-A091643.
%K A228418 more,nonn,base,hard
%O A228418 0,2
%A A228418 _Robert Price_, Nov 09 2013
%E A228418 a(12) from _Lucas A. Brown_, Mar 19 2024