%I
%S 2,5,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
%T 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
%U 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0
%N Decimal expansion of 1/4.
%C Also, decimal expansion of 1/2 * integral_0^infinity 1/cosh(Pi*x) dx.  _Bruno Berselli_, Mar 20 2013
%C In the complex plane, this purely real number gives the coordinates for the inward cusp of the main cardioid of the Mandelbrot set.  _Alonso del Arte_, Jun 05 2016
%t RealDigits[1/4, 10, 100][[1]] (* _Alonso del Arte_, Jun 05 2016 *)
%o (PARI) .25 \\ _Charles R Greathouse IV_, Apr 15 2015
%K nonn,cons,easy
%O 0,1
%A _N. J. A. Sloane_.
