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

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, 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, 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

Offset

1,1

Comments

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).

References

Benjamin Bederson, More Things in Heaven and Earth: A Celebration of Physics at the Millennium, Springer-Verlag, New York, 1999, p. 272.

J. C. Niemeyer and J. W. Truran, Type la Supernovae: Theory and Cosmology, Cambridge University Press, 2000, p. 107.

Links

Table of n, a(n) for n=1..105.

Hannu Kurki-Suonio, Cosmology I, Chapter 6: Thermal history of the Early Universe, p. 64.

Example

3.362643905961433780373627257001444199946066136306345400475287435797840...

Maple

Digits:=100: evalf(2+21/4*(4/11)^(4/3)); # Wesley Ivan Hurt, Oct 05 2014

Mathematica

RealDigits[N[2 + 21/4*(4/11)^(4/3), 105]][[1]]

Prog

(Magma) n:=2+21/4*(RealField(105)!4/11)^(4/3); Reverse(Intseq(Floor(10^104*n)));
(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, ", "));

Crossrefs

Cf. A111728.

Sequence in context: A205548 A010609 A066519 * A105158 A020813 A034188

Adjacent sequences: A236255 A236256 A236257 * A236259 A236260 A236261

Keyword

nonn,cons,easy

Author

Arkadiusz Wesolowski, Jan 21 2014

Status

approved