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 A216184 #14 Dec 15 2024 04:36:56
%S A216184 6,4,6,7,6,1,1,2,2,7,7,9,1,3,0,0,7,1,5,5,3,2,7,8,5,9,0,6,4,4,4,1,5,4,
%T A216184 8,5,6,9,5,6,7,6,6,4,5,5,5,3,4,5,9,1,4,9,4,4,6,7,6,9,8,5,9,1,3,5,8,9,
%U A216184 0,6,6,7,1,5,5,0,0,9,3,4,3,5,4,9,7,6,5,5,1,3,6,9,8,4,7,5,9,3,7,1
%N A216184 Decimal expansion of Integral_{x=0..Infinity} sin(x)/(x^2+1) dx.
%D A216184 Steven R. Finch, Mathematical Constants, Cambridge, 2003, pp. 424-425.
%e A216184 0.646761122...
%t A216184 (ExpIntegralEi[1] - E^2*ExpIntegralEi[-1])/(2*E) // RealDigits[#, 10, 100]& // First
%Y A216184 Cf. A086056 (Same integral with cos(x))
%K A216184 nonn,cons
%O A216184 0,1
%A A216184 _Jean-François Alcover_, Mar 11 2013