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 A155649 #17 Apr 24 2017 16:52:59 %S A155649 1,16,156,1546,15936,168826,1818216,19767106,216038496,2368025386, %T A155649 25997890776,285674467666,3140605159056,34535772837946, %U A155649 379828197747336,4177718354400226,45952550973479616,505463955158738506 %N A155649 a(n) = 11^n+6^n-1^n. %H A155649 <a href="/index/Rec#order_03">Index entries for linear recurrences with constant coefficients</a>, signature (18,-83,66). %F A155649 G.f.: 1/(1-11*x)+1/(1-6*x)-1/(1-x). %F A155649 E.g.f.: e^(11*x)+e^(6*x)-e^x. %F A155649 a(n) = 17*a(n-1)-66*a(n-2)-50 with a(0)=1, a(1)=16 - _Vincenzo Librandi_, Jul 21 2010 %p A155649 A155649:=n->11^n+6^n-1: seq(A155649(n), n=0..30); # _Wesley Ivan Hurt_, Apr 24 2017 %o A155649 (PARI) a(n)=11^n+6^n-1 \\ _Charles R Greathouse IV_, Jun 11 2015 %Y A155649 Cf. A155628, A155629, A155630, A155631, A155632, A155633, A155634, A155635, A155636, A155637, A155638, A155639, A155640, A155641, A155642, A155643, A155644, A155645, A155646, A155647, A155648. %K A155649 nonn,easy %O A155649 0,2 %A A155649 _Mohammad K. Azarian_, Jan 31 2009