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 A193086 #5 Mar 30 2012 18:57:38 %S A193086 2,3,9,2,5,2,8,6,5,9,2,7,2,4,2,9,0,9,7,3,8,7,4,9,2,1,1,6,5,8,9,2,2,7, %T A193086 7,1,9,8,4,9,9,5,5,0,1,4,5,3,6,9,6,8,6,8,6,9,2,7,7,4,8,7,9,3,5,5,3,7, %U A193086 5,2,1,7,6,8,8,0,0,2,3,7,4,2,1,2,5,7,9,4,2,1,4,5,3,5,9,1,0,0,8,1 %N A193086 Decimal expansion of the coefficient of x in the reduction of (e^x)*sin(x) by x^2->x+1. %C A193086 Reduction of a function f(x) by a substitution q(x)->s(x) is introduced at A193010. %e A193086 2.3925286592724290973874921165892277198499... %t A193086 f[x_] := Exp[x] Sin[x]; r[n_] := Fibonacci[n]; %t A193086 c[n_] := SeriesCoefficient[Series[f[x], {x, 0, n}], n] %t A193086 u0 = N[Sum[c[n]*r[n - 1], {n, 0, 100}], 100] %t A193086 RealDigits[u0, 10] (* A193085 *) %t A193086 u1 = N[Sum[c[n]*r[n], {n, 0, 100}], 100] %t A193086 RealDigits[u1, 10] (* A193086 *) %Y A193086 Cf. A193010, A192232, A193085. %K A193086 nonn,cons %O A193086 1,1 %A A193086 _Clark Kimberling_, Jul 15 2011