cp's OEIS Frontend

A236258 Decimal expansion of 2 + 21/4*(4/11)^(4/3).

%I A236258 #13 Sep 08 2022 08:46:06
%S A236258 3,3,6,2,6,4,3,9,0,5,9,6,1,4,3,3,7,8,0,3,7,3,6,2,7,2,5,7,0,0,1,4,4,4,
%T A236258 1,9,9,9,4,6,0,6,6,1,3,6,3,0,6,3,4,5,4,0,0,4,7,5,2,8,7,4,3,5,7,9,7,8,
%U A236258 4,0,5,5,3,4,9,2,9,1,7,6,2,5,9,7,5,2,7,7,0,1,2,5,9,7,9,6,6,5,0,9,6,5,5,7,9
%N A236258 Decimal expansion of 2 + 21/4*(4/11)^(4/3).
%C A236258 Evolution of the effective number of relativistic degrees of freedom contributing to energy density, g(*), can be seen on a graph as a function of temperature. At the energy scales below 0.1 MeV, g(*) is equal to this constant (in the Standard Model and in the minimal extension of Standard Model).
%D A236258 Benjamin Bederson, More Things in Heaven and Earth: A Celebration of Physics at the Millennium, Springer-Verlag, New York, 1999, p. 272.
%D A236258 J. C. Niemeyer and J. W. Truran, Type la Supernovae: Theory and Cosmology, Cambridge University Press, 2000, p. 107.
%H A236258 Hannu Kurki-Suonio, <a href="http://www.helsinki.fi/~hkurkisu/cosmology/Cosmo6.pdf">Cosmology I, Chapter 6: Thermal history of the Early Universe</a>, p. 64.
%e A236258 3.362643905961433780373627257001444199946066136306345400475287435797840...
%p A236258 Digits:=100: evalf(2+21/4*(4/11)^(4/3)); # _Wesley Ivan Hurt_, Oct 05 2014
%t A236258 RealDigits[N[2 + 21/4*(4/11)^(4/3), 105]][[1]]
%o A236258 (Magma) n:=2+21/4*(RealField(105)!4/11)^(4/3); Reverse(Intseq(Floor(10^104*n)));
%o A236258 (PARI) default(realprecision, 105); x=2+21/4*(4/11)^(4/3); for(n=1, 105, d=floor(x); x=(x-d)*10; print1(d, ", "));
%Y A236258 Cf. A111728.
%K A236258 nonn,cons,easy
%O A236258 1,1
%A A236258 _Arkadiusz Wesolowski_, Jan 21 2014