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 A225357 #18 Mar 19 2022 02:33:57 %S A225357 3,9,2,4,2,2,0,6,4,1,6,0,8,3,2,7,3,2,3,4,0,8,7,9,4,2,0,3,6,1,2,6,4,4, %T A225357 4,1,3,7,8,2,4,0,8,8,5,5,1,1,1,3,3,9,2,5,6,2,8,4,8,8,6,5,4,9,9,5,4,8, %U A225357 1,9,9,0,2,7,3,3,1,4,8,7,2,7,0,0,1,6,0,8,5,8,7,3,5,2,9,8,5,0,1,0,6,9,3,6,2 %N A225357 Decimal expansion of (4/7)*(43/57)^(4/3). %C A225357 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). %H A225357 Steven Weinberg, <a href="http://arxiv.org/abs/1305.1971">Goldstone bosons as fractional cosmic neutrinos</a>, arXiv:1305.1971 [astro-ph.CO], 2013. %F A225357 Equals decimal expansion of 172*(43/57)^(1/3)/399. %e A225357 0.3924220641608327323408794203612644413782408855111339... %t A225357 RealDigits[(4/7)*(43/57)^(4/3), 10, 110][[1]] (* _T. D. Noe_, Jun 03 2013 *) %o A225357 (Sage) numerical_approx((4/7)*(43/57)^(4/3), digits=115) # _G. C. Greubel_, Mar 19 2022 %Y A225357 Cf. A111728, A225359. %K A225357 nonn,cons %O A225357 0,1 %A A225357 _Omar E. Pol_, May 28 2013