%N Decimal expansion of the area of a circle with radius 299792458.
%C Pi * c^2 * s^2 represents the area of the circle with radius of one light second, where c = 299792458 m/s is the speed of light and s is seconds.
%F Equals Pi*(299792458)^2, that is, A000796 * A003678^2.
%e 282352266689536784.587705848234189... .
%t RealDigits[Pi*299792458^2, 10, 111][] (* _Robert G. Wilson v_, Dec 03 2017 *)
%Y Cf. A003678, A000796.
%A _Ahmad J. Masad_, Dec 03 2017
%E More terms from _Robert G. Wilson v_, Dec 03 2017