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 A127354 #10 Oct 10 2019 11:49:12
%S A127354 12,13,15,17,21,1113,1117,1119,1213,1219,1113,1317,1114,1314,1417,
%T A127354 1315,1519,1116,1617,1117,1317,1719,1318,1819,1719,1021,101113,101117,
%U A127354 101119,2113,111217,2113,111317,111319,111419,2115,111517,111316,111617,111317
%N A127354 Digit count of prime(n). The digit count numerically summarizes the frequency of digits 0 through 9 in that order when they occur in a number.
%H A127354 Reinhard Zumkeller, <a href="/A127354/b127354.txt">Table of n, a(n) for n = 1..10000</a>
%F A127354 a(n) = A047842(A000040(n)).
%t A127354 dc[n_] :=FromDigits@Flatten@Select[Table[{DigitCount[n, 10, k], k}, {k, 0, 9}], #[[1]] > 0 &];Table[dc[Prime[n]], {n, 40}] (* _Ray Chandler_, Jan 16 2007 *)
%o A127354 (Haskell)
%o A127354 a127354 = a047842 . a000040 -- _Reinhard Zumkeller_, Apr 14 2014
%Y A127354 Cf. A047842, A000040, A127355.
%K A127354 nonn,base
%O A127354 1,1
%A A127354 _Lekraj Beedassy_, Jan 11 2007