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 A101512 #13 Aug 31 2024 08:33:38
%S A101512 1,4,1,8,1,5,1,5,7,6,1,3,2,6,2,8,4,5,0,2,4,5,7,8,0,1,6,2,2,9,9,7,4,9,
%T A101512 4,2,9,1,4,2,4,5,3,3,4,9,2,9,5,0,1,6,2,7,1,8,4,2,7,2,0,2,2,9,6,9,6,1,
%U A101512 0,7,0,9,8,7,4,6,4,2,2,0,1,4,4,9,1,3,6,5,9,7,5,8,2,2,0,9,9,7,1,0,7,5,2,7,3
%N A101512 Decimal expansion of the sine integral at 2*Pi.
%C A101512 Si(Infinity)=Pi/2=~1.57079... (A019669).
%F A101512 Equals Integral_{x=0..2*Pi} sin(x)/x dx.
%e A101512 1.41815157613262845024578016229974942914245334929501627184272022969...
%t A101512 RealDigits[ SinIntegral[2Pi], 10, 111] [[1]]
%Y A101512 Cf. A019669, A036792, A099281.
%K A101512 cons,nonn
%O A101512 1,2
%A A101512 _Robert G. Wilson v_, Jan 25 2005