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 A097578 #10 Sep 08 2021 13:46:41
%S A097578 1,6,10,28,36,88,104,240,272,608,672,1472,1600,3456,3712,7936,8448,
%T A097578 17920,18944,39936,41984,88064,92160,192512,200704,417792,434176,
%U A097578 901120,933888,1933312,1998848,4128768,4259840,8781824,9043968,18612224,19136512,39321600
%N A097578 a(n) = (2*n+1)*2^floor((n+1)/2).
%H A097578 Robert Israel, <a href="/A097578/b097578.txt">Table of n, a(n) for n = 0..6608</a>
%H A097578 <a href="/index/Rec#order_04">Index entries for linear recurrences with constant coefficients</a>, signature (0,4,0,-4).
%F A097578 G.f.: (1+6*x+6*x^2+4*x^3)/(1-2*x^2)^2. - _Robert Israel_, Feb 28 2017
%p A097578 seq(seq((4*k+2*j+1)*2^(k+j), j=[0,1]),k=0..50); # _Robert Israel_, Feb 28 2017
%t A097578 LinearRecurrence[{0,4,0,-4},{1,6,10,28},40] (* _Harvey P. Dale_, Sep 08 2021 *)
%Y A097578 Right-hand edge of triangle in A097474.
%K A097578 nonn
%O A097578 0,2
%A A097578 _N. J. A. Sloane_, Sep 21 2004