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 A085353 #11 Jul 25 2019 18:10:39
%S A085353 1,8,62,470,3506,25838,188642,1367150,9849986,70629518,504484322,
%T A085353 3591856430,25505792066,180717326798,1278081981602,9024938035310,
%U A085353 63644751231746,448334368529678,3155267239152482,22188430630735790
%N A085353 Expansion of (1-5x)/((1-6x)(1-7x)).
%C A085353 Binomial transform of A085352.
%H A085353 <a href="/index/Rec#order_02">Index entries for linear recurrences with constant coefficients</a>, signature (13,-42).
%F A085353 a(n) = 2*7^n-6^n.
%F A085353 a(n) = 2*A000420(n) - A000400(n). - _Michel Marcus_, Dec 03 2013
%p A085353 A085353:=n->2*7^n - 6^n; seq(A085353(n), n=0..20); # _Wesley Ivan Hurt_, Dec 02 2013
%t A085353 Table[2*7^n - 6^n, {n, 0, 20}] (* _Wesley Ivan Hurt_, Dec 02 2013 *)
%t A085353 CoefficientList[Series[(1-5x)/((1-6x)(1-7x)),{x,0,30}],x] (* _Harvey P. Dale_, Apr 22 2019 *)
%Y A085353 Cf. A085352.
%K A085353 easy,nonn
%O A085353 0,2
%A A085353 _Paul Barry_, Jun 24 2003