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 A202813 #23 Jul 20 2024 03:53:38
%S A202813 2,71,828,1828,45904,523536,287471,35266249,775724709,3699959574,
%T A202813 96696762772,407663035354,7594571382178,52516642742746,
%U A202813 639193200305992,1817413596629043,57290033429526059,563073813232862794,3490763233829880753,19525101901157383418
%N A202813 Next n digits of e.
%t A202813 With[{e=RealDigits[E,10,500][[1]]},FromDigits/@Table[Take[e,{n (n-1)/2+1,(n(n+1))/2}],{n,25}]]
%Y A202813 Cf. A001113.
%K A202813 nonn,base
%O A202813 1,1
%A A202813 _Harvey P. Dale_, Dec 24 2011