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 A355905 #15 Mar 31 2024 19:04:35 %S A355905 0,2,1,1,0,1,1,1,1,2,1,1,0,2,1,2,0,1,0,2,0,1,1,2,0,1,0,2,1,2,1,2,1,2, %T A355905 1,2,1,1,0,1,0,1,1,2,0,1,0,1,0,2,0,1,0,1,1,2,1,2,0,1,1,2,0,1,0,2,1,2, %U A355905 0,2,0,2,0,2,1,2,1,1,1,2,0,1,1,1,0,2,1,2,0,1,1 %N A355905 Leftmost path in the tree T_0 of all negasemiternary (or NST) fractions whose 2-adic part is zero. %C A355905 These are the edge labels in the tree. The initial a(0) = 0 is by convention. %H A355905 Don Knuth, <a href="http://cs.stanford.edu/~knuth/papers/ambidextrous.pdf">Ambidextrous Numbers</a>, Preprint, September 2022. See (7.2). %Y A355905 Cf. A355904, A355906-A355913. %K A355905 nonn %O A355905 0,2 %A A355905 _N. J. A. Sloane_, Sep 18 2022