%I A086201
%S A086201 1,5,9,1,5,4,9,4,3,0,9,1,8,9,5,3,3,5,7,6,8,8,8,3,7,6,3,3,7,2,5,1,4,3,6,
%T A086201 2,0,3,4,4,5,9,6,4,5,7,4,0,4,5,6,4,4,8,7,4,7,6,6,7,3,4,4,0,5,8,8,9,6,7,
%U A086201 9,7,6,3,4,2,2,6,5,3,5,0,9,0,1,1,3,8,0,2,7,6,6,2,5,3,0,8,5,9,5,6
%N A086201 Decimal expansion of 1/(2pi).
%C A086201 Contribution from Eric Desbiaux (moongerms(AT)wanadoo.fr), Dec 21 2008: 
               (Start)
%C A086201 If a single hump of cycloid, arc length equal 8*radius (generating circle),
%C A086201 is inside a rectangle, width=2*radius and length=2*Pi*radius,
%C A086201 also the radius must be 1/(2*Pi),A086201,
%C A086201 to have (2/Pi), A060294, as semi arc of cycloid (arc=4/Pi=A088538)
%C A086201 and the rectangle... length=1, width=1/Pi.
%C A086201 I suppose that in 3D geometry, gliding along a cycloid, in all directions 
               around, from a point A at the height of 1/Pi, give Pi*point B
%C A086201 (End)
%H A086201 Eric Weisstein's World of Mathematics, <a href="http://mathworld.wolfram.com/
               PlouffesConstant.html">Plouffe's Constant</a>
%H A086201 Eric Weisstein's World of Mathematics, <a href="http://mathworld.wolfram.com/
               PythagoreanTriple.html">Pythagorean Triple</a>
%e A086201 0.15915...
%t A086201 RealDigits[N[1/(2*Pi),6! ]][[1]] [From Vladimir Orlovsky (4vladimir(AT)gmail.com), 
               Jun 18 2009]
%Y A086201 Sequence in context: A096789 A019705 A127414 this_sequence A010490 A021173 
               A063921
%Y A086201 Adjacent sequences: A086198 A086199 A086200 this_sequence A086202 A086203 
               A086204
%K A086201 nonn,cons
%O A086201 0,2
%A A086201 Eric Weisstein (eric(AT)weisstein.com), Jul 12, 2003