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 A274981 #16 Jan 11 2020 15:57:47 %S A274981 1,4,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, %T A274981 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, %U A274981 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0 %N A274981 Decimal expansion of gamma(2) = 7/5. %C A274981 gamma(n) = Cp(n)/Cv(n) is the n-th Poisson's constant. For the definition of Cp and Cv see A272002. %H A274981 Kshitij Education, <a href="http://www.kshitij-iitjee.com/molar-specific-heat-of-an-ideal-gas">Molar specific heat</a>. %H A274981 Wikipedia, <a href="https://en.wikipedia.org/wiki/Heat_capacity_ratio">Poisson's constant</a>. %F A274981 7/5 = (7/2 R)/(5/2 R) = Cp(2)/Cv(2) = A272003/A272002, with R = A081822 (or A070064). %Y A274981 Cf. A020793 = gamma(1). %K A274981 nonn,cons,easy %O A274981 1,2 %A A274981 _Natan Arie Consigli_, Aug 31 2016