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 A051557 #12 Nov 05 2017 21:55:30 %S A051557 9,9,9,6,2,4,2,1,6,8,5,9,4,8,1,6,0,9,4,7,6,7,2,2,4,0,3,4,8,9,5,2,5,5, %T A051557 9,5,9,0,0,7,1,3,7,3,5,0,7,1,2,2,2,3,6,1,8,0,8,1,2,7,1,9,5,2,7,9,2,8, %U A051557 6,0,1,6,6,9,3,3,3,3,2,9,9,2,9,4,9,7,3,7,9,6,8,9,1,4,4,4,2,9,6 %N A051557 Decimal expansion of cos(Pi/2 degrees). (Of course, cos(Pi/2 radians) = 0.) %e A051557 0.999624216... %p A051557 evalf(cos(Pi^2/360)) ; %t A051557 RealDigits[Cos[Pi/2 Degree],10,120][[1]] (* _Harvey P. Dale_, Sep 21 2011 *) %o A051557 (PARI) cos(Pi^2/360) \\ _Charles R Greathouse IV_, Nov 05 2017 %Y A051557 Cf. A051553-A051555, A051558, A051559. %K A051557 nonn,easy,cons %O A051557 0,1 %A A051557 _N. J. A. Sloane_