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 A240815 #16 Jul 16 2015 23:02:16
%S A240815 14,11,12,14,45,32,50,39,81,59,70,62,58
%N A240815 a(n) = index of first nonexisting term of the meta-Fibonacci sequence {f(1) = ... = f(n) = 1; f(k)=f(k-f(k-3))+f(k-f(k-n))} if that sequence is only defined for finitely many terms, or 0 if that sequence is infinite.
%C A240815 This is equal to A240812(n)+1. See that entry for further information.
%H A240815 B. Balamohan, A. Kuznetsov and S. Tanny, <a href="http://www.cs.uwaterloo.ca/journals/JIS/VOL10/Tanny/tanny3.html">On the behavior of a variant of Hofstadter's Q-sequence</a>, J. Integer Sequences, Vol. 10 (2007), #07.7.1.
%H A240815 D. R. Hofstadter, Curious patterns and non-patterns in a family of meta-Fibonacci recursions, Lecture in Doron Zeilberger's Experimental Mathematics Seminar, Rutgers University, April 10 2014; <a href="https://vimeo.com/91708646">Part 1</a>, <a href="https://vimeo.com/91710600">Part 2</a>.
%H A240815 <a href="/index/Ho#Hofstadter">Index entries for Hofstadter-type sequences</a>
%Y A240815 See A240812 for another version.
%Y A240815 A diagonal of the triangle in A240816.
%K A240815 nonn,more
%O A240815 3,1
%A A240815 _N. J. A. Sloane_, Apr 15 2014