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%I #20 Oct 01 2022 00:13:12
%S 2,5,1,3,2,7,4,1,2,2,8,7,1,8,3,4,5,9,0,7,7,0,1,1,4,7,0,6,6,2,3,6,0,2,
%T 3,0,7,3,5,7,7,3,5,5,1,9,5,0,0,0,8,4,6,5,6,7,7,9,9,5,5,6,7,3,8,4,6,2,
%U 5,3,1,2,5,0,2,8,9,6,7,1,9,8,9,0,2,4,2,7,8,6,0,2,7,3,6,9,3,6,5,4,3,8,5,7
%N Decimal expansion of 4*Pi/5.
%C With offset 2, decimal expansion of 8*Pi.
%C 8*Pi is also the surface area of a sphere whose diameter equals the square root of 8, hence its radius equals the square root of 2. More generally x*Pi is also the surface area of a sphere whose diameter equals the square root of x. - _Omar E. Pol_, Dec 18 2013
%H <a href="/index/Tra#transcendental">Index entries for transcendental numbers</a>
%e 4*Pi/5 = 2.5132741228718345907701147066236023073577...
%e 8*Pi = 25.132741228718345907701147066236023073577...
%t RealDigits[(4 Pi)/5,10,120][[1]] (* _Harvey P. Dale_, Aug 24 2017 *)
%o (PARI) .8*Pi \\ _Charles R Greathouse IV_, Oct 01 2022
%Y Cf. A002193, A228819.
%Y Cf. A000796, A019692, A122952, A019694, A019669, A228719, A228721 (Pi through 7*Pi).
%K nonn,cons
%O 1,1
%A _Omar E. Pol_, Oct 03 2013