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 A198692 #21 Sep 08 2022 08:45:59 %S A198692 10,76,538,3772,26410,184876,1294138,9058972,63412810,443889676, %T A198692 3107227738,21750594172,152254159210,1065779114476,7460453801338, %U A198692 52223176609372,365562236265610,2558935653859276,17912549577014938 %N A198692 a(n) = 11*7^n-1. %H A198692 Vincenzo Librandi, <a href="/A198692/b198692.txt">Table of n, a(n) for n = 0..1000</a> %H A198692 <a href="/index/Rec#order_02">Index entries for linear recurrences with constant coefficients</a>, signature (8,-7). %F A198692 a(n) = 7*a(n-1)+6. a(n) = 8*a(n-1)-7*a(n-2), n>1. %F A198692 G.f.: ( 10-4*x ) / ( (7*x-1)*(x-1) ). - _R. J. Mathar_, Oct 30 2011 %t A198692 11 (7^Range[0, 30]) - 1 (* _Wesley Ivan Hurt_, Jan 21 2017 *) %o A198692 (Magma) [11*7^n-1: n in [0..30]] %Y A198692 Cf. A024075, A048473, A081655, A198480, A198647. %K A198692 nonn,easy %O A198692 0,1 %A A198692 _Vincenzo Librandi_, Oct 29 2011