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 A358476 #8 Nov 18 2022 12:29:46 %S A358476 0,0,0,0,1,2,2,1,1,0,1,3,4,3,2,3,2,2,2,2,4,4,3,3,3,3,5,5,3,3,3,3,2,3, %T A358476 4,6,6,7,8,8,7,9,10,12,13,13,12,14,15,15,16,16,16,17,17,18,19,19,18, %U A358476 19,19,19,20,21,21,21,20,20,21,21,21,21,21,21,21,21,21,21,21,21,21,22,23,23,24,25,25,25,25,26,26,26,27,27,27,27 %N A358476 Number of 3's that appeared in the n-th step when constructing A030717. %C A358476 Also first differences of A358470. %Y A358476 Cf. A358467, A358469, A358477, A358478, A358479, A358480. %Y A358476 Cf. A030717, A030725. %K A358476 nonn %O A358476 1,6 %A A358476 _Seiichi Manyama_, Nov 18 2022