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 A073442 #3 Mar 30 2012 17:36:39 %S A073442 1,8,2,1,9,5,3,2,3,4,6,1,1,2,0,3,7,6,3,2,2,2,0,2,2,9,7,4,5,7,6,7,9,6, %T A073442 7,0,1,4,0,6,5,1,4,4,5,0,0,4,1,9,6,3,9,8,4,8,2,5,8,1,1,2,5,9,4,8,0,5, %U A073442 5,6,8,7,0,0,5,3,1,7,2,4,8,9,0,6,4,2,1,1,8,0,3,2,2,8,2,7,7,1,0,1,1,8,3,3,8 %N A073442 Decimal expansion of cot (Pi degrees) (of course cot (Pi radians) is undefined). %e A073442 18.2195323461120376322202297457... %o A073442 (PARI) cotan(Pi^2/180) %Y A073442 Cf. A051555 (tan(Pi degrees)=1/A073442), A051553 (sin(Pi degrees)), A051554 (cos(Pi degrees)), A073440 (csc(Pi degrees)), A073441 (sec(Pi degrees)). %K A073442 cons,nonn %O A073442 2,2 %A A073442 _Rick L. Shepherd_, Jul 31 2002