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 A030745 #8 Feb 12 2021 20:46:08 %S A030745 5,14,27,37,51,66,84,99,103,104,125,126,149,150,152,174,176,232,256, %T A030745 259,267,270,288,309,352,394,398,439,442,447,495,499,551,596,598,605, %U A030745 610,665,671,729,736,797,802,806,854,858,869,874 %N A030745 Numbers k such that A030737(k) = 3. %Y A030745 Cf. A030737. %K A030745 nonn %O A030745 1,1 %A A030745 _Clark Kimberling_