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 A110812 #13 Mar 29 2025 23:57:21 %S A110812 1,1,4,1,1,4,4,1,2,1,1,4,3,4,5,1,6,2,2,1,3,1,7,4,3,3,0,4,9,5,5,1,0,6, %T A110812 4,2,8,2,8,1,0,3,1,1,6,7,8,4,8,3,7,3,2,0,4,4,2,9,0,5,9,5 %N A110812 Fractalization of sqrt 2. %C A110812 Self-descriptive sequence: even terms are the sequence itself, odd terms are the digits of the decimal expansion of sqrt 2. %H A110812 Clark Kimberling, <a href="http://faculty.evansville.edu/ck6/integer/fractals.html">Fractal sequences</a>. %F A110812 a(2n)=a(n); a(2n+1)=digits of sqrt 2. %Y A110812 Cf. A002193 (sqrt 2), A003602. %Y A110812 Cf. A110766 (of Pi), A110779 (of e), A382130 (of phi). %K A110812 easy,nonn,base %O A110812 1,3 %A A110812 _Alexandre Wajnberg_, Sep 15 2005