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 A358477 #8 Nov 18 2022 12:29:52 %S A358477 0,0,0,0,0,0,1,1,0,1,0,0,0,1,1,0,0,0,0,1,0,0,1,1,1,2,1,0,2,2,2,3,5,5, %T A358477 4,3,2,3,3,3,4,4,4,4,4,4,5,5,5,5,5,6,6,6,6,6,6,6,7,7,7,7,7,7,7,7,8,8, %U A358477 8,8,8,9,9,9,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,9,9,10,10,10,10,10,10,10 %N A358477 Number of 4's that appeared in the n-th step when constructing A030717. %C A358477 Also first differences of A358472. %Y A358477 Cf. A358467, A358469, A358476, A358478, A358479, A358480. %Y A358477 Cf. A030717, A030726. %K A358477 nonn %O A358477 1,26 %A A358477 _Seiichi Manyama_, Nov 18 2022