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 A155674 #11 Jul 22 2025 06:19:36 %S A155674 1,2,22,332,4642,61052,771562,9487172,114358882,1357947692, %T A155674 15937424602,185311670612,2138428376722,24522712143932, %U A155674 279749833583242,3177248169415652,35949729863572162,405447028499293772 %N A155674 11^n-10^n+1^n. %H A155674 <a href="/index/Rec">Index entries for linear recurrences with constant coefficients</a>, signature (22,-131,110). %F A155674 G.f.: 1/(1-11*x)-1/(1-10*x)+1/(1-x). E.g.f.: e^(11*x)-e^(10*x)+e^x. %F A155674 a(n)=21*a(n-1)-110*a(n-2)+90 with a(0)=1, a(1)=2 [From _Vincenzo Librandi_, Jul 21 2010] %Y A155674 A155654, A155655, A155656, A155657, A155658, A155659, A155660, A155661, A155662, A155663, A155664, A155665, A155666, A155667, A155668, A155669, A155670, A155671, A155672, A155673 %K A155674 nonn %O A155674 0,2 %A A155674 _Mohammad K. Azarian_, Feb 01 2009