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 A155662 #26 Jan 18 2023 02:22:04
%S A155662 1,5,73,989,12241,144245,1653913,18663629,208594081,2317594085,
%T A155662 25654949353,283334343869,3124587089521,34425823133525,
%U A155662 379071610510393,4172500607905709,45916496933002561,505214397985306565,5558288899894321033,61147691553229173149
%N A155662 a(n) = 11^n - 7^n + 1.
%H A155662 <a href="/index/Rec#order_03">Index entries for linear recurrences with constant coefficients</a>, signature (19,-95,77).
%F A155662 G.f.: 1/(1-11*x) - 1/(1-7*x) + 1/(1-x).
%F A155662 E.g.f.: e^(11*x) - e^(7*x) + e^x.
%F A155662 a(n) = 18*a(n-1) - 77*a(n-2) + 60; a(0)=1, a(1)=5. - _Vincenzo Librandi_, Jul 21 2010
%t A155662 Table[11^n-7^n+1,{n,0,30}] (* _Harvey P. Dale_, Jan 16 2023 *)
%o A155662 (PARI) a(n)=11^n-7^n+1 \\ _Charles R Greathouse IV_, Jun 11 2015
%Y A155662 Cf. A155638, A155639, A155640, A155641, A155642, A155643, A155644, A155645, A155646, A155647, A155648, A155649, A155650, A155651, A155652, A155653, A155654, A155655, A155656, A155657, A155658, A155659, A155660, A155661.
%K A155662 nonn,easy
%O A155662 0,2
%A A155662 _Mohammad K. Azarian_, Jan 31 2009