This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A082726 #15 Sep 13 2017 03:10:05 %S A082726 0,137,27,1,3,1,1 %N A082726 Continued fraction expansion of current estimate of the fine-structure constant alpha. %C A082726 The estimate is continually changing. %C A082726 The term a(7) is today known to be in between 15 and 17, but most likely equal to 16. %C A082726 The value refers to the zero-energy limit of the coupling constant. At higher energies the value increases; e.g. at the energy 90 GeV of the Z-boson, it is about 1/128. %C A082726 a(7) is believed to be 17 or 18 according to the revised 2014 CODATA value. - _Charles R Greathouse IV_, Sep 13 2017 %H A082726 NIST, <a href="https://physics.nist.gov/cgi-bin/cuu/Value?alph|search_for=fine+structure">fine-structure constant</a> %H A082726 NIST, <a href="https://physics.nist.gov/cgi-bin/cuu/Value?alphinv|search_for=fine+structure">inverse fine-structure constant</a> %H A082726 Wikipedia, <a href="http://en.wikipedia.org/wiki/Fine-structure_constant">Fine-structure constant</a>. %F A082726 alpha = e^2*c*mu/2h, where e ~ 1.602e-19 is the elementary charge, c = 299792458 m/s the speed of light, mu = pi*4e-7 H/m the vacuum permeability, and h ~ 6.626e-34 Planck's constant. %e A082726 CODATA 2014: alpha = 0.007 297 352 5664(17) = 1 / 137.035 999 139(31), where values in parentheses indicate uncertainty in the preceding 2 digits. %Y A082726 Cf. A005600. %K A082726 nonn,cofr,hard,more %O A082726 0,2 %A A082726 _N. J. A. Sloane_, May 21 2003