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 A117021 #7 Aug 23 2013 12:03:40 %S A117021 1,4,1,2,2,8,2,9,2,7,4,3,7,3,9,1,9,1,4,6,0,9,3,3,5,0,0,4,5,4,1,6,2,4, %T A117021 9,0,2,3,7,2,2,9,5,1,1,4,3,5,0,8,1,7,2,0,8,0,5,3,2,7,2,6,0,6,4,9,9,2, %U A117021 7,9,0,2,9,7,5,1,1,2,6,3,5,4,5,5,4,8,7,1,9,1,4,7,0,4,6,8,4,7,7,9,9,6,5,2,3 %N A117021 Decimal expansion of (sine of 1 radian)^(-2)=(csc 1 radian)^2. %e A117021 1.41228292743739191460933500454162490237229511435081720805327260649927902975112635455487191470468477996523963837778216770 %t A117021 RealDigits[Sin[1]^-2,10,120][[1]] (* _Harvey P. Dale_, Aug 23 2013 *) %Y A117021 Cf. A049469; A073447. %K A117021 cons,nonn,less %O A117021 1,2 %A A117021 _Mohammad K. Azarian_, Apr 15 2006