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 A073302 #10 Apr 11 2024 16:45:45
%S A073302 0,1,4,8,11,15,16,17,18,19,22,24,26,28,29,30,33,36,37,38,39,40,42,45,
%T A073302 50,52,53,60,62,63,64,65,68,71,73,74,75,76,78,79,82,83,85,87,89,91,92,
%U A073302 93,98,99,101,102,106,110,111,114,116,119
%N A073302 Indices of prime digits (2, 3, 5, 7) in the decimal expansion of e.
%H A073302 Harvey P. Dale, <a href="/A073302/b073302.txt">Table of n, a(n) for n = 1..1000</a>
%e A073302 e=2.71828182... so the indices of prime digits are 0,1,4,8...
%t A073302 With[{edgs=RealDigits[E,10,120][[1]]},Flatten[Position[edgs,_?(PrimeQ[#]&)]]-1] (* _Harvey P. Dale_, Apr 11 2024 *)
%Y A073302 Cf. A001113.
%K A073302 easy,nonn,base
%O A073302 1,3
%A A073302 Y. Kelly Itakura (yitkr(AT)mta.ca), Aug 22 2002
%E A073302 More terms from _Ray G. Opao_, Aug 31 2004