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 A164913 #12 Sep 02 2025 21:56:12 %S A164913 1,9,92,917,9175,91742,917433,9174309,91743124,917431185,9174311939, %T A164913 91743119246,917431192693,9174311926553,91743119266140, %U A164913 917431192660413,9174311926605727,91743119266054686,917431192660551041,9174311926605503645 %N A164913 Expansion of x/(1-9*x-11*x^2+10*x^3). %H A164913 <a href="/index/Rec#order_03">Index entries for linear recurrences with constant coefficients</a>, signature (9,11,-10). %F A164913 a(n) = +9*a(n-1) +11*a(n-2) -10*a(n-3). - _Joerg Arndt_, May 14 2011 %F A164913 a(n) = 10*a(n-1)+F(n) for n=odd and a(n) = 10*a(n-1)-F(n) for n=even, with a(0) = 0 and F(n) is the n-th Fibonacci number. %Y A164913 Cf. A000045, A021113. %K A164913 nonn,easy,changed %O A164913 1,2 %A A164913 _Mark Dols_, Aug 31 2009