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 A372253 #8 Apr 28 2024 11:42:34
%S A372253 1,7,9,8,1,4,7,2,8,0,5,6,2,6,9,0,1,8,0,9,0,5,8,2,0,1,2,4,3,3,7,4,2,2,
%T A372253 9,3,2,9,2,0,3,2,4,6,3,4,3,7,1,8,3,9,1,4,3,3,8,6,8,3,9,4,7,3,0,0,4,6,
%U A372253 6,8,4,5,8,3,3,6,6,9,1,5,2,9,5,9,8,1
%N A372253 Decimal expansion of Sum_{k>=0} (1 / (k^2 + k + 1)).
%e A372253 1.79814728056269018090582012433742293292032463437183...
%t A372253 s = Chop[N[Sum[1/(k^2 + k + 1), {k, 0, Infinity}], 120]]
%t A372253 First[RealDigits[s]]
%Y A372253 Cf. A371804.
%K A372253 nonn,cons
%O A372253 1,2
%A A372253 _Clark Kimberling_, Apr 24 2024