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%I #26 Sep 22 2023 10:41:30
%S 3,2,4,7,5,9,5,2,6,4,1,9,1,6,4,4,9,2,5,3,6,3,9,6,1,8,9,0,3,2,3,5,1,0,
%T 6,8,8,0,1,7,7,5,9,8,5,0,8,9,4,4,6,3,6,7,7,6,0,4,6,3,8,0,8,6,4,7,2,3,
%U 7,4,4,0,6,7,0,4,0,0,0,0,6,9,5,2,7,1,4,9,1,0,0,1,6,9,8,4,1,0,7,9
%N Decimal expansion of 3*sqrt(3)/16.
%C Decimal expansion of constant arising in analysis of classical atom in an expanding universe.
%C A quadratic number with denominator 16 and minimal polynomial 256*x^2 - 27. - _Charles R Greathouse IV_, Apr 21 2016
%H W. B. Bonnor, <a href="http://www.physics.umd.edu/grt/taj/675e/Bonnor.pdf">Size of a hydrogen atom in the expanding universe</a>, Class. Quantum Grav. 16(1999), p. 1313.
%H Richard H. Price and Joseph D. Romano, <a href="https://arxiv.org/abs/gr-qc/0508052">In an expanding universe, what doesn't expand?</a>, arXiv:gr-qc/0508052, 2005-2012; American Journal of Physics, May 2012, Volume 80, Issue 5, pp. 37.
%H <a href="/index/Al#algebraic_02">Index entries for algebraic numbers, degree 2</a>
%e 0.3247595264....
%t RealDigits[(3Sqrt[3])/16,10,120][[1]] (* _Harvey P. Dale_, Sep 22 2023 *)
%o (PARI) sqrt(27)/16 \\ _Charles R Greathouse IV_, Apr 21 2016
%K nonn,easy,cons
%O 0,1
%A _Jonathan Vos Post_, Jun 01 2012
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