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 A030746 #8 Feb 12 2021 20:09:42 %S A030746 6,7,18,19,38,48,50,65,82,83,123,148,173,175,201,204,237,262,265,272, %T A030746 291,294,302,306,341,349,396,435,437,445,476,489,493,498,545,548,553, %U A030746 555,606,612,667,726,733,795,804,867,873,877 %N A030746 Numbers k such that A030737(k) = 4. %Y A030746 Cf. A030737. %K A030746 nonn %O A030746 1,1 %A A030746 _Clark Kimberling_