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 A077467 #16 Feb 16 2025 08:32:48 %S A077467 1,2,2,3,3,4,5,5,6,6,7,8,8,9,9,10,10,11,12,12,13,13,14,15,15,16,16,17, %T A077467 18,18,19,19,20,20,21,22,22,23,23,24,25,25,26,26,27,27,28,29,29,30,30, %U A077467 31,32,32,33,33,34,34,35,36,36,37,37,38,39,39,40,40,41,41,42,43,43,44 %N A077467 Sum of binary digits of A077465(n). %H A077467 H. Harborth, <a href="http://dx.doi.org/10.1090/S0002-9939-1977-0429714-1">Number of Odd Binomial Coefficients</a>, Proc. Amer. Math. Soc. 62, 19-22, 1977. %H A077467 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/Stolarsky-HarborthConstant.html">Stolarsky-Harborth Constant</a> %Y A077467 Cf. A006046, A077464, A077465, A077466. %K A077467 nonn,base %O A077467 1,2 %A A077467 _Eric W. Weisstein_, Nov 05 2002