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 A266744 #13 Dec 30 2019 14:06:53
%S A266744 1,1,1,2,3,4,5,7,9,11,14,17,21,25,30,36,42,49,57,66,76,87,99,112,127,
%T A266744 143,160,179,200,222,246,272,300,330,362,397,434,473,515,560,608,658,
%U A266744 712,769,829,893,960,1031,1106,1185,1268,1355,1447,1543,1644,1750,1861,1977,2098,2225,2358,2496,2640,2791,2948,3111,3281,3458,3642
%N A266744 G.f.: 1/((1-t^4)*(1-t)*(1-t^3)*(1-t^5)*(1-t^7)).
%t A266744 CoefficientList[Series[1/((1-t^4)(1-t)(1-t^3)(1-t^5)(1-t^7)),{t,0,100}],t] (* _Harvey P. Dale_, Dec 30 2019 *)
%K A266744 nonn
%O A266744 0,4
%A A266744 _N. J. A. Sloane_, Jan 10 2016