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 A083585 #7 Jun 13 2015 00:51:03
%S A083585 1,10,60,320,1640,8280,41560,208120,1041240,5207480,26039960,
%T A083585 130204920,651034840,3255194680,16276014360,81380153720,406900932440,
%U A083585 2034504989880,10172525604760,50862629334520,254313149294040
%N A083585 (8*5^n - 5*2^n)/3.
%C A083585 Binomial transform of A083854.
%H A083585 <a href="/index/Rec#order_02">Index entries for linear recurrences with constant coefficients</a>, signature (7,-10).
%F A083585 a(n) = (8*5^n-5*2^n)/3.
%F A083585 G.f. (1+3x)/((1-2x)(1-5x)).
%F A083585 E.g.f. (8*exp(5x) - 5*exp(2x))/3.
%t A083585 LinearRecurrence[{7, -10}, {1, 10}, 20] (* _T. D. Noe_, Aug 06 2013 *)
%K A083585 easy,nonn
%O A083585 0,2
%A A083585 _Paul Barry_, May 01 2003