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 A030774 #8 Feb 12 2021 20:45:48 %S A030774 1,3,13,18,25,26,34,35,45,46,58,59,73,74,91,92,111,112,133,179,209, %T A030774 211,218,221,224,241,276,284,314,317,324,356,360,362,364,366,402,406, %U A030774 423,451,455,460,504,506,510,517,519,559,616,676 %N A030774 Numbers k such that A030767(k) = 2. %Y A030774 Cf. A030767. %K A030774 nonn %O A030774 1,2 %A A030774 _Clark Kimberling_