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 A030754 #8 Feb 12 2021 20:09:32 %S A030754 4,9,10,22,73,76,93,110,112,132,154,175,176,180,199,209,236,240,273, %T A030754 304,305,309,347,382,387,421,425,428,431,470,479,521,525,530,583,635, %U A030754 640,688,693,695,699,757,762,822,829,877,886,891 %N A030754 Numbers k such that A030747(k) = 2. %Y A030754 Cf. A030747. %K A030754 nonn %O A030754 1,1 %A A030754 _Clark Kimberling_