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 A225359 #25 Jun 07 2013 09:02:30 %S A225359 3,3,9,2,4,2,2,0,6,4,1,6,0,8,3,2,7,3,2,3,4,0,8,7,9,4,2,0,3,6,1,2,6,4, %T A225359 4,4,1,3,7,8,2,4,0,8,8,5,5,1,1,1,3,3,9,2,5,6,2,8,4,8,8,6,5,4,9,9,5,4, %U A225359 8,1,9,9,0,2,7,3,3,1,4,8,7,2,7,0,0,1,6,0,8,5,8,7,3,5,2,9,8,5,0,1,0,6,9,3,6 %N A225359 Decimal expansion of suggested value for N_eff: the effective number of neutrino species present in the era before recombination. %C A225359 Decimal expansion of (3 + (4/7)*(43/57)^(4/3) = 3 + 172*(43/57)^(1/3)/399). %C A225359 Steven Weinberg suggested that the contribution from Goldstone bosons to the effective number of neutrino species present in the era before recombination would be (4/7)*(43/57)^(4/3) = 0.392422..., so N_eff should be 3 + (4/7)*(43/57)^(4/3) = 3.392422... %H A225359 Steven Weinberg, <a href="http://arxiv.org/abs/1305.1971">Goldstone bosons as fractional cosmic neutrinos</a> %H A225359 Wikipedia, <a href="http://en.wikipedia.org/wiki/Neutrino">Neutrino</a> %F A225359 3 + (4/7)*(43/57)^(4/3) = 3+A225357. %e A225359 3.39242206416083273234087942036126444137824088551113392562848... %K A225359 nonn,cons %O A225359 1,1 %A A225359 _Omar E. Pol_, May 28 2013