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 A001355 M2239 N0889 #29 Aug 22 2024 20:44:44
%S A001355 3,2,1,7,4,1,1,8,5,2,9,8,2,1,6,8,5,2,3,8,5,4,8,5,9,9,7,0,9,4,3,5,2,2,
%T A001355 3,3,8,5,4,3,6,6,2,0,6,2,4,8,3,7,3,4,8,7,3,1,2,3,7,5,9,2,5,6,0,6,2,2,
%U A001355 8,4,8,9,4,7,1,7,9,5,7,7,1,2,6,4,9,7,3,0,9,9,9,3,3,6,7,9,5,9,1,9
%N A001355 Mix digits of Pi and e.
%D A001355 N. J. A. Sloane, A Handbook of Integer Sequences, Academic Press, 1973 (includes this sequence).
%D A001355 N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).
%H A001355 Arkadiusz Wesolowski, <a href="/A001355/b001355.txt">Table of n, a(n) for n = 1..10000</a>
%H A001355 <a href="/index/Ph#Pi314">Index entries for sequences related to the number Pi</a>
%e A001355 3.21741185298216852385485997... .
%t A001355 Flatten[Transpose[{RealDigits[Pi, 10, 50][[1]], RealDigits[E, 10, 50][[1]]}]]
%t A001355 Riffle[RealDigits[Pi, 10, 50][[1]], RealDigits[E, 10, 50][[1]]] (* _Robert G. Wilson v_, Jun 23 2014 *)
%Y A001355 Cf. A058382.
%K A001355 nonn,base,cons,dumb,easy
%O A001355 1,1
%A A001355 _N. J. A. Sloane_