%I A117240
%S A117240 0,0,0,0,0,0,3,8,3,7,5,8,7,9,7,9,2,5,1,2,2,6,1,0,3,4,0,7,1,3,3,1,8,6,2,
               0,4,8,3,9,1,
%T A117240 0,0,7,9,3,0,0,5,5,9,4,0,7,2,5,0,9,5,6,9,0,3,0,0,2,2,7,9,9,1,7,3,4,3,6,
%U A117240 6,0,6,8,5,2,7,4,3,2,7,6,5,0,0,8,4,2,8,4,5,6,4,7,2,6,9,9,1,0,1,5,3,5,3
%N A117240 Decimal expansion of solution to problem #10 in the Trefethen challenge.
%H A117240 Eric Weisstein's World of Mathematics, <a href="http://mathworld.wolfram.com/
               Hundred-DollarHundred-DigitChallengeProblems.html">Hundred-Dollar, 
               Hundred-Digit Challenge Problems</a>
%F A117240 (2*ArcCos[Sqrt[ModularLambda[I/10]]])/Pi
%e A117240 0.0000003837587979251226103...
%Y A117240 Sequence in context: A115369 A084233 A015136 this_sequence A151857 A010706 
               A125025
%Y A117240 Adjacent sequences: A117237 A117238 A117239 this_sequence A117241 A117242 
               A117243
%K A117240 nonn,cons
%O A117240 0,7
%A A117240 Eric Weisstein (eric(AT)weisstein.com), Mar 05, 2006