Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 61st year, we have over 378,000 sequences, and we’ve reached 11,000 citations (which often say “discovered thanks to the OEIS”).
%I #22 Feb 09 2019 12:45:46
%S 4,7,7,1,3,4,5,1,5,9,2,3,6,9,4,2,2,5,8,8,8,8,8,9,8,3,3,3,7,7,3,6,4,5,
%T 0,2,3,4,6,1,2,5,3,7,8,9,8,3,4,0,6,6,8,8,1,2,0,1,4,2,1,4,8,4,1,7,4,8,
%U 3,6,7,7,3,1,0,9,3,3,5,7,8,8,3,4,8,8,4,6,8,4,3,1,0,2,2,2,1,2,0
%N Decimal expansion of c/(2*Pi), where c = 299792458 (exactly) is the speed of light in vacuum (m/s).
%C Decimal expansion of 149896229/Pi.
%F Equals A003678 / A019692 = A003678 * A086201. - _Omar E. Pol_, Mar 18 2018
%e 47713451.592369422588888983337736450234612537898340668812014...
%e If the circumference of a circle is equal to 299792458 meters then the radius is equal to 47713451.59... meters.
%t RealDigits[299792458/(2Pi),10,120][[1]] (* _Harvey P. Dale_, Feb 09 2019 *)
%o (PARI) x=299792458/(2*Pi)/10^7; for(k=1, 100, my(d=floor(x)); x=(x-d)*10; print1(d, ", ")) \\ _Felix Fröhlich_, Mar 31 2018
%Y Cf. A000796, A003678, A019692, A086201, A132997, A167526.
%K cons,nonn
%O 8,1
%A _Omar E. Pol_, Dec 17 2010
%E Edited by _N. J. A. Sloane_, Dec 18 2010