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 A187747 #17 Feb 15 2020 23:31:21
%S A187747 1,-6,3,-7,3,1,1,-2,3,-5,1,3,0,7,5,-2,0,0,3,1,0,2,4,-4,-4,-1,1,2,-1,2,
%T A187747 7,-1,-6,0,4,-1,-3,-6,4,0,-1,2,2,3,0,6,-3,-2,-4,-8,-5,-4,3,-5,-4,0,1,
%U A187747 -2,0,-2,-3,-1,7,-5,-4,-2,3,8,-6,0,-2,-3,6,-1,3,3,-3,-4,1,4,0,4,1,-5,7,-3,-5,2,7,-5,-3,-2,2,-3,0,-5
%N A187747 (n-th digit of Pi) - (n-th digit of e).
%C A187747 This is A073223 but without taking absolute values.
%H A187747 Michael De Vlieger, <a href="/A187747/b187747.txt">Table of n, a(n) for n = 0..10000</a>
%e A187747 Pi = 3.141592... and e = 2.718281... so we have
%e A187747 a(0) = 3 - 2 = 1,
%e A187747 a(1) = 1 - 7 = -6,
%e A187747 a(2) = 4 - 1 = 3, ...
%t A187747 Subtract @@ RealDigits[{Pi, E}, 10, 96][[All, 1]] (* _Michael De Vlieger_, Feb 15 2020 *)
%Y A187747 Cf. A000796, A001113, A073223, A073244.
%K A187747 sign,base,easy
%O A187747 0,2
%A A187747 _Jonathan Vos Post_, Jan 03 2013