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 A352578 #3 Apr 07 2022 12:38:41 %S A352578 1,2,1,1,2,2,1,2,3,2,1,2,3,3,2,1,2,3,2,2,3,3,2,2,3,3,2,3,4,2,1,3,4,3, %T A352578 2,2,3,3,2,3,4,3,2,3,4,3,2,3,4,3,2,3,4,3,2,4,5,2,1,3,4,4,3,2,3,4,3,3, %U A352578 4,3,2,3,4,4,3,2,3,5,4,2,3,5,4,2,3,4,3,3,4,4,3,3,4,3,2,4,5,4,3,1,2,5,4,3,4,3,2,4,5,4,3,2,3,5,4,3,4 %N A352578 a(n) = binary weight of A305369(n). %Y A352578 Cf. A305369. %K A352578 nonn %O A352578 1,2 %A A352578 _N. J. A. Sloane_, Apr 07 2022