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 A010729 #33 Dec 14 2023 05:52:39
%S A010729 7,9,7,9,7,9,7,9,7,9,7,9,7,9,7,9,7,9,7,9,7,9,7,9,7,9,7,9,7,9,7,9,7,9,
%T A010729 7,9,7,9,7,9,7,9,7,9,7,9,7,9,7,9,7,9,7,9,7,9,7,9,7,9,7,9,7,9,7,9,7,9,
%U A010729 7,9,7,9,7,9,7,9,7,9,7,9,7
%N A010729 a(n) = 8 - (-1)^n.
%H A010729 <a href="/index/Rec#order_02">Index entries for linear recurrences with constant coefficients</a>, signature (0,1).
%F A010729 Period 2.
%F A010729 a(n+1) = A173512(n+1) - A173512(n). - _Reinhard Zumkeller_, Feb 20 2010
%F A010729 G.f.: ( -7-9*x ) / ( (x-1)*(1+x) ). - _R. J. Mathar_, Nov 20 2011
%F A010729 E.g.f.: 7*cosh(x) + 9*sinh(x). - _Stefano Spezia_, Sep 27 2023
%t A010729 PadRight[{},100,{7,9}] (* _Harvey P. Dale_, May 09 2012 *)
%o A010729 (PARI) a(n)=8-(-1)^n \\ _Charles R Greathouse IV_, Jun 11 2015
%K A010729 nonn,easy
%O A010729 0,1
%A A010729 _N. J. A. Sloane_