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 A192374 #11 May 11 2014 11:07:13 %S A192374 0,2,4,28,84,406,1448,6200,23688,97034,380716,1533844,6079452, %T A192374 24339742,96844496,386805104,1541301648,6150529682,24521644756, %U A192374 97819530508,390080615652,1555871900710,6204937972088,24747735482792,98698893741336 %N A192374 Coefficient of x in the reduction of the polynomial p(n,x) defined at A162517 and below in Comments. %C A192374 The polynomials p(n,x) is defined by ((x+d)^n-(x-d)^n)/(2d), where d=sqrt(x+4). A192374=2*A192375. For an introduction to reductions of polynomials by substitutions such as x^2->x+1, see A192232. %F A192374 Empirical G.f.: 2*x^2/(9*x^4+6*x^3-10*x^2-2*x+1). [_Colin Barker_, Nov 23 2012] %e A192374 (See A192373.) %t A192374 (See A192373.) %Y A192374 Cf. A192232, A192373, A192375. %K A192374 nonn %O A192374 1,2 %A A192374 _Clark Kimberling_, Jun 29 2011