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 A051555 #9 Nov 05 2017 21:54:58 %S A051555 0,5,4,8,8,6,1,5,0,8,0,8,0,0,3,3,2,8,8,4,7,9,9,8,7,8,9,2,0,8,2,8,1,6, %T A051555 9,4,1,3,0,8,8,5,1,0,4,1,3,8,5,1,0,8,3,5,2,2,2,3,4,8,5,0,2,7,6,2,4,5, %U A051555 8,0,8,3,2,1,2,7,9,1,9,4,0,5,7,0,0,7,4,6,3,6,1,3,5,1,6,8,4,4,9 %N A051555 Decimal expansion of tan(Pi degrees). (Of course, tan(Pi radians) = 0.) %e A051555 tan (Pi^2 / 180) = 0.0548861508080033288... %o A051555 (PARI) tan(Pi^2/180) \\ _Charles R Greathouse IV_, Nov 05 2017 %Y A051555 Cf. A051553, A051554, A051557-A051559. %K A051555 nonn,cons,easy %O A051555 0,2 %A A051555 _N. J. A. Sloane_