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 A347220 #13 Aug 05 2024 13:46:19
%S A347220 9,9,9,9,0,1,4,6,2,2,3,8,0,5,4,5,4,4,5,4,0,7,5,2,1,9,5,7,4,3,7,7,7,8,
%T A347220 0,8,1,0,6,8,0,3,5,2,8,9,1,7,5,2,4,5,6,0,1,5,8,0,1,8,6,2,9,1,8,3,4,3,
%U A347220 6,3,0,1,4,4,9,8,9,9,8,0,9,6,1,0,8,6,3
%N A347220 Decimal expansion of Sum_{k=2..10} zeta(k).
%H A347220 Michael I. Shamos, <a href="https://citeseerx.ist.psu.edu/pdf/ae33a269baba5e8b1038e719fb3209e8a00abec5">Shamos's catalog of the real numbers</a> (2011).
%e A347220 9.9990146223805454454075219574377780810680...
%t A347220 RealDigits[Total[Zeta[Range[2, 10]]], 10, 120][[1]] (* _Amiram Eldar_, Jun 07 2023 *)
%Y A347220 Cf. A002117, A013661, A013662, A013663, A013664, A013665, A013666, A013667, A013668.
%Y A347220 Cf. A347213, A347214, A347215, A347216, A347217, A347218, A347219.
%K A347220 nonn,cons
%O A347220 1,1
%A A347220 _Sean A. Irvine_, Aug 24 2021