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 A347215 #15 Aug 05 2024 13:43:38
%S A347215 4,9,6,6,2,4,1,9,5,8,8,6,2,3,2,8,8,3,9,7,1,9,5,2,2,5,1,1,1,5,5,6,7,7,
%T A347215 2,5,0,8,1,5,7,6,8,0,6,4,9,6,7,9,3,7,0,3,9,1,8,4,9,9,8,6,7,8,0,5,9,7,
%U A347215 6,9,8,8,2,1,6,2,7,6,4,2,9,5,1,3,7,0,3
%N A347215 Decimal expansion of Sum_{k=2..5} zeta(k).
%H A347215 Michael I. Shamos, <a href="https://citeseerx.ist.psu.edu/pdf/ae33a269baba5e8b1038e719fb3209e8a00abec5">Shamos's catalog of the real numbers</a> (2011).
%e A347215 4.9662419588623288397195225111556772508157680...
%t A347215 RealDigits[Total[Zeta[Range[2, 5]]], 10, 120][[1]] (* _Amiram Eldar_, Jun 07 2023 *)
%Y A347215 Cf. A002117, A013661, A013662, A013663.
%Y A347215 Cf. A347213, A347214, A347216, A347217, A347218, A347219, A347220.
%K A347215 nonn,cons
%O A347215 1,1
%A A347215 _Sean A. Irvine_, Aug 24 2021