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 A355913 #7 Sep 19 2022 07:36:07 %S A355913 2,1,1,2,0,1,0,2,2,1,1,1,1,1,1,2,2,0,2,1,2,1,2,2,0,2,0,1,0,2,1,2,1,0, %T A355913 0,2,2,0,1,1,1,0,1,1,0,0,2,1,2,1,0,0,1,2,1,0,1,0,2,0,1,1,0,1,0,0,0,2, %U A355913 0,1,2,1,2,0,1,2 %N A355913 Negasemiternary (or NST) representation of the unit ambinumber (1,0). %H A355913 Don Knuth, <a href="http://cs.stanford.edu/~knuth/papers/ambidextrous.pdf">Ambidextrous Numbers</a>, Preprint, September 2022. See (15.3). %e A355913 (1, 0) = 2.11201 02211 11112 20212 12202 01021 ... %Y A355913 Cf. A355904-A355912. %K A355913 nonn %O A355913 1,1 %A A355913 _N. J. A. Sloane_, Sep 19 2022