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 A192925 #5 Mar 30 2012 18:57:37 %S A192925 0,1,3,11,51,281,1808,13333,111041,1031758,10588015,118985914, %T A192925 1453708722,19189390169,272212629009,4130239145929,66751752077187, %U A192925 1144920631189237,20772556460037154,397492611715916267,8000930139415926955 %N A192925 Coefficient of x in the reduction by (x^2->x+1) of the polynomial p(n,x) defined below at Comments. %C A192925 The titular polynomial is defined by p(n,x)=n*p(n-1,x)+(x^2)*p(n-2,x), with p(0,x)=1, p(1,x)=x. For discussions of polynomial reduction, see A192232, A192744, and A192872. %t A192925 (See A192924.) %Y A192925 Cf. A192232, A192744, A192924. %K A192925 nonn %O A192925 0,3 %A A192925 _Clark Kimberling_, Jul 12 2011