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 A030687 #5 Mar 08 2023 12:36:29 %S A030687 4,7,30,13,16,19,70,80,90,100,110,38,130,140,150,160,170,57,190,200, %T A030687 210,220,230,240,250,260,270,280,290,300,310,320,330,340,350,360,370, %U A030687 380,390,400,410,420,136,440,450,460,470,480,490,500,510,520 %N A030687 Square root of A030686. %Y A030687 Cf. A030686. %K A030687 nonn,base %O A030687 1,1 %A A030687 _Patrick De Geest_