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 A139743 #24 Apr 01 2025 07:14:09 %S A139743 0,6,96,1206,14016,157926,1755936,19409046,213968256,2355994566, %T A139743 25927658976,285262842486,3138184236096,34521491440806, %U A139743 379743730067616,4177217651837526,45949577275681536,505446265559840646,5559913498794965856,61159071374928218166,672749899565128368576 %N A139743 a(n) = 11^n - 5^n. %H A139743 Vincenzo Librandi, <a href="/A139743/b139743.txt">Table of n, a(n) for n = 0..300</a> %H A139743 <a href="/index/Rec#order_02">Index entries for linear recurrences with constant coefficients</a>, signature (16,-55). %F A139743 a(n) = 16*a(n-1) - 55*a(n-2). - _Vincenzo Librandi_, Jun 02 2011 %F A139743 a(n) = 6*A016165(n-1) for n >= 1. - _Philippe Deléham_, Mar 23 2023 %F A139743 From _Elmo R. Oliveira_, Apr 01 2025: (Start) %F A139743 G.f.: 6*x/((1-5*x)*(1-11*x)). %F A139743 E.g.f.: 2*exp(8*x)*sinh(3*x). (End) %o A139743 (Magma) [11^n-5^n: n in [0..30]]; // _Vincenzo Librandi_, Jun 02 2011 %Y A139743 Cf. A000351 (5^n), A001020 (11^n), A016165. %K A139743 nonn,easy %O A139743 0,2 %A A139743 _N. J. A. Sloane_, May 20 2008