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 A091706 #17 Jul 21 2015 06:10:21
%S A091706 1,3,32,324,3282,31949,309669,2995706,28891689,278270868,2678674624,
%T A091706 25780340194,248131741834,2388797604792
%N A091706 Number of primes less than 10^n having at least one digit 5.
%e A091706 a(1) = 1 because of the 4 primes less than 10^1, 1 has at least one digit 5.
%t A091706 NextPrim[n_] := Block[{k = n + 1}, While[ !PrimeQ[k], k++ ]; k]; c = 0; p = 1; Do[ While[ p = NextPrim[p]; p < 10^n, If[ Position[ IntegerDigits[p], 5] != {}, c++ ]]; Print[c]; p--, {n, 1, 8}] (* _Robert G. Wilson v_, Feb 02 2004 *)
%t A091706 Table[Count[Prime[Range[PrimePi[10^n]]],_?(DigitCount[#,10,5]>0&)],{n,8}] (* _Harvey P. Dale_, Dec 29 2012 *)
%Y A091706 a(n) + A091639(n) = A006880(n).
%Y A091706 Cf. A091644, A091645, A091646, A091647, A091705, A091707, A091708, A091709, A091710.
%K A091706 nonn,base
%O A091706 1,2
%A A091706 _Enoch Haga_, Jan 30 2004
%E A091706 Edited and extended by _Robert G. Wilson v_, Feb 02 2004
%E A091706 3 more terms from _Ryan Propper_, Aug 21 2005
%E A091706 a(13) from _Robert Price_, Nov 11 2013
%E A091706 a(14) from _Giovanni Resta_, Jul 21 2015