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 A346588 #11 Aug 17 2021 10:49:31
%S A346588 3,7,7,3,9,4,8,0,6,0,1,9,7,0,1,5,8,1,8,3,8,5,4,0,2,4,2,6,6,2,9,5,1,2,
%T A346588 7,4,9,7,6,8,0,7,4,1,7,3,2,2,2,5,8,4,3,8,0,8,8,1,3,1,6,1,8,5,0,8,4,3,
%U A346588 3,7,8,3,8,1,7,1,7,8,1,7,2,6,3,6,5,0,4,1,2,2,5,5,8,7,9,7,4,2,3,4,5,7,5,0,1
%N A346588 Decimal expansion of the sum of reciprocals of tribonacci numbers A000213.
%e A346588 3.7739480601970158183854024266295127497680741732225...
%t A346588 RealDigits[Total[1/LinearRecurrence[{1, 1, 1}, {1, 1, 1}, 500]], 10, 105][[1]] (* _Amiram Eldar_, Jul 26 2021 *)
%Y A346588 Cf. A000213, A079586, A084119, A093540, A153386, A153387.
%K A346588 nonn,cons
%O A346588 1,1
%A A346588 _Christoph B. Kassir_, Jul 24 2021
%E A346588 More terms from _Jon E. Schoenfield_, Jul 25 2021