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 A077466 #11 Feb 16 2025 08:32:48 %S A077466 1,5,11,37,103,317,967,2869,8639,25853,77623,232997,698735,2096461, %T A077466 6288871,18867125,56600351,169802077,509408279,1528220741,4584666319, %U A077466 13753990765,41261980487,123785957845,371357840767,1114073555069 %N A077466 a(n) = A006046(A077465(n)). %H A077466 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 A077466 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/Stolarsky-HarborthConstant.html">Stolarsky-Harborth Constant</a> %Y A077466 Cf. A006046, A077464, A077465, A077467. %K A077466 nonn %O A077466 1,2 %A A077466 _Eric W. Weisstein_, Nov 05 2002